1939 Wars & Armed Conflicts Events — Verified Historical Highlights

1939 Wars & Armed Conflicts Events — Verified Historical Highlights | TakeMeBack.to

04 Jan Leadership Change in Imperial Japan: On January 4, 1939, a significant leadership change occurred in Imperial Japan, impacting its military and political strategies during World War II. This shift was part of the broader changes in Japanese governance during the war. source: history.com
05 Jan Battle of Valsequillo: The Battle of Valsequillo occurred on January 5, 1939, during the Spanish Civil War. This battle was part of the Nationalist forces' campaign to capture key territories in Catalonia. source: britannica.com
13 Jan Nationalist Forces Capture Tortosa: On January 13, 1939, Nationalist forces captured the city of Tortosa during the Spanish Civil War. This victory was significant in the context of the Nationalists' campaign in Catalonia. source: britannica.com
24 Jan Spanish government relocates to Valencia during Civil War: On January 24, 1939, the Spanish government relocated to Valencia as the Nationalist forces advanced during the Spanish Civil War. This marked a significant moment in the conflict, reflecting the deteriorating situation for the Republican side. source: britannica.com
25 Jan Barcelona falls to Nationalist troops in Spanish Civil War: On January 25, 1939, Barcelona fell to Nationalist troops, marking a decisive victory in the Spanish Civil War. This event signified the collapse of Republican resistance in Catalonia and led to the end of the war in the region. source: britannica.com
26 Jan Spanish Civil War: Fall of Barcelona to Franco's forces: On January 26, 1939, Barcelona officially fell to the forces of Francisco Franco, marking a pivotal moment in the Spanish Civil War. This event led to the consolidation of Nationalist control over Spain. source: britannica.com
27 Jan Hitler approves Plan Z for German naval expansion: On January 27, 1939, Adolf Hitler approved Plan Z, a comprehensive naval expansion program aimed at building a formidable Kriegsmarine. The plan outlined the construction of various warships, including battleships, aircraft carriers, and cruisers, to challenge the naval dominance of Britain and France. source: en.wikipedia.org
05 Feb Franco Becomes Leader of Spain: Following the capture of Girona, Francisco Franco solidified his position as the leader of Spain during the Spanish Civil War. source: en.wikipedia.org
14 Feb Launch of the Bismarck Battleship: On February 14, 1939, the German battleship Bismarck was launched in Hamburg, Germany. The ship was one of the largest and most powerful battleships ever built, and its launch was a significant event in naval history. source: historydiaries.blog
22 Feb Netherlands Recognizes Franco's Regime in Spain: On February 22, 1939, the Netherlands officially recognized Francisco Franco's regime in Spain, following the conclusion of the Spanish Civil War. source: en.wikipedia.org
27 Feb Belgian Government of Pierlot Falls: The Belgian government led by Hubert Pierlot collapsed, reflecting the political instability in Europe during the pre-World War II period.
02 Mar Hitler advises Slovak independence: On March 2, 1939, Adolf Hitler expressed support for the independence of Slovakia, which was a significant political maneuver during the lead-up to World War II. This event highlighted the shifting alliances in Europe at the time. source: britannica.com
05 Mar Spanish Civil War: National Defence Council coup: On March 5, 1939, a coup occurred within the National Defence Council during the Spanish Civil War, marking a significant shift in the conflict. This event contributed to the eventual victory of Franco's forces. source: britannica.com
07 Mar Cartagena Uprising suppressed during Spanish Civil War: The Cartagena Uprising, an insurrection by Republican troops in Cartagena against the Republican government, was suppressed by March 7, 1939. The Nationalist troop transport Castillo de Olite, carrying over 2,000 soldiers, was sunk by Republican shore batteries during the conflict. source: en.wikipedia.org
08 Mar Franco implements total naval blockade during Spanish Civil War: On March 8, 1939, Generalissimo Francisco Franco declared a total blockade of all remaining Republican-held ports. All ships entering the three-mile limit were to be seized regardless of nationality, or torpedoed if sighted near Cartagena. source: en.wikipedia.org
26 Mar Spanish Civil War: Final Nationalist Offensive: On March 26, 1939, Nationalist forces led by Francisco Franco launched their final offensive in the Spanish Civil War. This campaign led to the capture of Madrid on March 28, effectively ending the conflict. source: history.com
28 Mar Franco Conquers Madrid, Ending Spanish Civil War: On March 28, 1939, General Francisco Franco's Nationalist forces entered Madrid, marking the end of the Spanish Civil War. This victory led to the establishment of Francoist Spain. source: history.com
01 Apr Papal recognition of Franco's victory: On April 1, 1939, the Vatican acknowledged General Francisco Franco's victory in the Spanish Civil War, marking the end of the conflict and the establishment of Franco's regime in Spain. source: paperspast.natlib.govt.nz
03 Apr Hitler orders invasion planning for Poland: On April 3, 1939, Adolf Hitler ordered the German military to begin planning for the invasion of Poland, setting the stage for World War II. source: en.wikipedia.org
07 Apr Italy invades Albania: On April 7, 1939, Italian forces launched an invasion of Albania, marking the beginning of the Italian occupation. source: en.wikipedia.org
08 Apr King Zog I escapes Albania: On April 8, 1939, King Zog I of Albania fled the country to Greece during the Italian invasion. source: en.wikipedia.org
15 Apr Albert Lebrun Elected President of France: On April 15, 1939, Albert Lebrun was re-elected as President of France. His presidency continued until the German invasion in 1940, during which he was captured and held as a prisoner of war. source: en.wikipedia.org
02 May Molotov replaces Litvinov as Soviet Foreign Commissar: Vyacheslav Molotov was appointed as the Soviet Foreign Commissar on May 2, 1939, replacing Maxim Litvinov. This change marked a significant shift in Soviet foreign policy leading up to World War II. source: britannica.com
03 May Formation of All India Forward Bloc: The All India Forward Bloc was formed on May 3, 1939, by Subhas Chandra Bose as a faction within the Indian National Congress. It aimed to consolidate anti-colonial forces and promote a more radical approach to India's independence. source: britannica.com
04 May Japan's diplomatic support for Axis powers: On May 4, 1939, Japan expressed its diplomatic support for the Axis powers, aligning itself with Germany and Italy during World War II. This move was part of Japan's broader strategy to expand its influence in Asia. source: britannica.com
05 May Poland stands firm against Nazi territorial demands: On May 5, 1939, Poland rejected Nazi Germany's territorial demands, asserting its sovereignty in the face of increasing pressure. This stance contributed to the tensions leading up to World War II. source: britannica.com
11 May Battle of Nomonhan: Japanese-Soviet Conflict: On May 11, 1939, a border clash occurred between Japanese and Soviet forces near the Khalkhin Gol River, escalating into the Battle of Nomonhan, a significant conflict between Japan and the Soviet Union. source: en.wikipedia.org
21 May Pact of Steel Signed: On May 21, 1939, Italy and Germany signed the Pact of Steel, a military and political alliance that solidified the Axis powers' cooperation during World War II. The pact committed both nations to support each other in times of war and marked a significant escalation in European tensions.
23 May Hitler's Threat to Poland: On May 23, 1939, Adolf Hitler informed Wehrmacht generals of his decision to wage war against Poland, with the Free City of Danzig as a pretext. He expressed confidence that Britain would not intervene, even if it did, Germany could economically cripple Britain by conquering the Low Countries and France. source: en.wikipedia.org
01 Jun HMS Thetis submarine tragedy: On June 1, 1939, the British submarine HMS Thetis sank during sea trials in Liverpool Bay, resulting in the loss of 99 lives. The disaster occurred when seawater flooded the forward compartments after an internal torpedo tube was opened while the outer hatch was also open. Only four men survived the incident. source: en.wikipedia.org
07 Jun Germany signs non-aggression pacts with Baltic states: On June 7, 1939, Nazi Germany signed non-aggression pacts with Estonia, Latvia, and Lithuania. These agreements were part of Germany's strategic moves leading up to World War II. source: en.wikipedia.org
08 Jun Prelude to conflict: German sergeant killed in Czechoslovakia: On June 8, 1939, a German sergeant was killed in Czechoslovakia, an event that heightened tensions in the region and was seen as a prelude to further conflict leading up to World War II. source: en.wikipedia.org
20 Jun SS Heimwehr Danzig formation: The SS Heimwehr Danzig was formed on June 20, 1939, as a paramilitary unit in Danzig, which was under German control. This unit played a role in the Nazi regime's military and political strategies leading up to World War II. source: britannica.com
21 Jun Nazi restrictions on Jewish economic rights: On June 21, 1939, the Nazi regime implemented further restrictions on the economic rights of Jewish citizens in Germany. These measures were part of a broader campaign of discrimination and persecution against Jews leading up to World War II. source: britannica.com
23 Jun Ankara talks resolve Hatay dispute: On June 23, 1939, negotiations in Ankara successfully resolved the Hatay dispute between Turkey and France. This agreement was significant in shaping the geopolitical landscape of the region during the pre-World War II era. source: britannica.com
29 Jun Poland declares readiness to defend Danzig: On June 29, 1939, Poland declared its readiness to defend the city of Danzig, a free city under the protection of the League of Nations, amid rising tensions with Germany. This declaration was part of the escalating conflicts that led to the outbreak of World War II. source: archives.gov
02 Jul Neuengamme concentration camp established: On July 2, 1939, the Neuengamme concentration camp was established near Hamburg, Germany. This camp became one of the largest in the Nazi concentration camp system during World War II. source: ushmm.org
12 Jul Diplomatic tension: Dino Grandi recalled from London: Dino Grandi, the Italian ambassador to the United Kingdom, was recalled to Italy amid rising tensions before World War II. This move was part of Italy's shifting diplomatic stance as the war loomed closer. source: britannica.com
13 Jul French newspaper espionage charges: On July 13, 1939, a French newspaper reported on espionage charges against several individuals, highlighting the growing concerns over national security in the lead-up to World War II. This incident reflected the tense political climate of the time. source: britannica.com
16 Jul Sir Oswald Mosley's controversial speech at Earls Court: On July 16, 1939, Sir Oswald Mosley delivered a controversial speech at Earls Court in London, which drew significant public attention and criticism. His remarks reflected the political tensions in Britain during the pre-war period. source: bbc.com
18 Jul Roosevelt warns of impending European war: On July 18, 1939, U.S. President Franklin D. Roosevelt issued a warning about the potential for an impending European war, urging nations to seek peaceful resolutions to conflicts. This statement underscored the growing international tensions leading up to World War II.
23 Jul Gandhi's personal letter to Hitler: On July 23, 1939, Mahatma Gandhi wrote a letter to Adolf Hitler, urging him to prevent a war that could reduce humanity to a savage state. The letter was intercepted by the British government and never reached Hitler. source: time.com
20 Aug Soviet-Japanese Border Conflict at Nomanhan: The Nomanhan incident, also known as the Battle of Khalkhin Gol, was a series of clashes between the Soviet Union and Japan along the border of Mongolia. The conflict escalated in August 1939, culminating in a decisive Soviet victory, which influenced future Soviet-Japanese relations. source: britannica.com
21 Aug Nazi-Soviet Non-Aggression Pact Confirmed: On August 21, 1939, the Nazi-Soviet Non-Aggression Pact was confirmed, ensuring that Germany and the Soviet Union would not attack each other. This agreement had significant implications for the geopolitical landscape of Europe leading up to World War II. source: britannica.com
22 Aug Hitler's Decisive War Speech to Military Leadership: On August 22, 1939, Adolf Hitler delivered a speech to military leaders outlining his plans for the upcoming war. This speech emphasized the need for swift and decisive action against Poland, marking a significant moment in the lead-up to World War II. source: britannica.com
23 Aug Molotov-Ribbentrop Pact Signed: The Molotov-Ribbentrop Pact was signed on August 23, 1939, between Nazi Germany and the Soviet Union. This non-aggression treaty included secret protocols for the division of Eastern Europe, significantly impacting the course of World War II. source: britannica.com
24 Aug Roosevelt's last diplomatic effort: On August 24, 1939, President Franklin D. Roosevelt made a final diplomatic effort to avert war in Europe, reaching out to both Britain and France. This was part of his broader strategy to maintain peace and stability in the face of rising tensions with Nazi Germany. source: archives.gov
25 Aug Poland-Britain mutual assistance agreement: On August 25, 1939, Poland and Britain signed a mutual assistance agreement, pledging military support in the event of an attack by Germany. This agreement was a crucial step in the lead-up to World War II, solidifying alliances against Nazi aggression. source: britannica.com
26 Aug Canada mobilizes military defenses: On August 26, 1939, Canada began mobilizing its military defenses in response to the growing threat of war in Europe. This marked a significant step in Canada's involvement in World War II, as it prepared to support Britain and its allies. source: bbc.com
27 Aug Nazi Germany's territorial demands: On August 27, 1939, Nazi Germany made further territorial demands on Poland, escalating tensions that would lead to the outbreak of World War II. These demands were part of Hitler's aggressive expansionist policies in Europe. source: britannica.com
28 Aug German troop buildup observed on Polish border: On August 28, 1939, reports indicated a significant concentration of German military forces along the Polish border. This buildup was part of Germany's preparations for the invasion of Poland, which would commence on September 1, 1939. The presence of these troops heightened tensions and signaled the imminent threat of war. source: thesecondworldwar.org
30 Aug Nazi Germany initiates invasion of Poland: On August 30, 1939, Nazi Germany initiated its invasion of Poland, marking the beginning of World War II. This invasion was preceded by a series of provocations and diplomatic tensions, including the Gleiwitz incident, which provided a pretext for German aggression. source: encyclopedia.ushmm.org
31 Aug Nazi false flag operation at Gleiwitz: On August 31, 1939, Nazi Germany staged a false flag operation at Gleiwitz, where they attacked a German radio station, blaming it on Polish forces. This event was used as a pretext for the invasion of Poland, marking the beginning of World War II. source: britannica.com
01 Sep Nazi Germany invades Poland, starting World War II: On September 1, 1939, Nazi Germany invaded Poland, marking the official start of World War II in Europe. This invasion was characterized by the use of blitzkrieg tactics, overwhelming Polish defenses. source: britannica.com
02 Sep Luftwaffe decimates Polish Air Force: On September 2, 1939, the German Luftwaffe launched a series of devastating air attacks against the Polish Air Force, significantly crippling its capabilities. This aerial assault was part of the broader German invasion strategy. source: britannica.com
03 Sep Britain declares war on Germany: On September 3, 1939, Britain declared war on Germany in response to the invasion of Poland. This declaration marked the official entry of the United Kingdom into World War II. source: britannica.com
04 Sep German Forces Capture Polish Cities: On September 4, 1939, German forces continued their rapid advance into Poland, capturing several major cities. This marked a significant escalation in the invasion, leading to widespread destruction and civilian casualties. source: en.wikipedia.org
05 Sep United States Declares Neutrality in World War II: On September 5, 1939, the United States declared its neutrality in World War II, opting to avoid direct involvement in the conflict despite global tensions. source: en.wikipedia.org
06 Sep German Invasion of Poland: On September 6, 1939, German forces launched a full-scale invasion of Poland, marking the beginning of World War II. This aggressive action led to widespread destruction and significant loss of life. source: en.wikipedia.org
07 Sep Westerplatte Fortress surrenders in World War II: On September 7, 1939, after seven days of intense fighting, the Polish garrison at Westerplatte, led by Major Henryk Sucharski, surrendered to German forces. The defenders had held out against repeated assaults, artillery bombardments, and air raids, inflicting significant casualties on the Germans. The surrender marked the end of the first battle of the German invasion of Poland, which initiated World War II in Europe. source: liberationroute.com
08 Sep German invasion of Warsaw begins: On September 8, 1939, German forces commenced their assault on Warsaw, the capital of Poland. This marked a significant escalation in the invasion, leading to the eventual encirclement and siege of the city. source: en.wikipedia.org
09 Sep Battle of the Bzura begins: On September 9, 1939, the Battle of the Bzura commenced as Polish forces launched a counteroffensive against the advancing German troops. The battle aimed to relieve pressure on Warsaw and disrupt German supply lines. source: en.wikipedia.org
10 Sep Canada declares war on Germany: On September 10, 1939, Canada declared war on Germany, marking the first time Canada declared war independently. This decision followed the United Kingdom's declaration of war on Germany on September 3, 1939, in response to Germany's invasion of Poland. source: canada.ca
11 Sep Panama declares neutrality in World War II: On September 11, 1939, Panama declared its neutrality in World War II, aligning with other American republics to maintain peace in the Western Hemisphere. source: history.state.gov
14 Sep German forces encircle Warsaw: On September 14, 1939, German forces successfully encircled Warsaw, the capital of Poland, as part of their invasion strategy during World War II. This encirclement marked a significant step in the German campaign against Poland, leading to the city's eventual surrender. source: britannica.com
15 Sep German Wehrmacht besieges Warsaw: On September 15, 1939, the German Wehrmacht intensified its siege of Warsaw, further tightening its grip on the city. This military action was crucial in the broader context of the invasion of Poland, which was a key early campaign in World War II. source: britannica.com
16 Sep Border war between Soviet Union and Japan ends: On September 16, 1939, the border war between the Soviet Union and Japan officially came to an end with a ceasefire agreement. This conflict had significant implications for both nations' military strategies and their relations in the years leading up to World War II. source: britannica.com
17 Sep Soviet invasion of Eastern Poland: On September 17, 1939, the Soviet Union invaded Eastern Poland, following the secret protocol of the Molotov-Ribbentrop Pact. This invasion marked a significant expansion of the conflict in Europe and led to the division of Poland between Germany and the Soviet Union. source: britannica.com
18 Sep German-Soviet invasion and partition of Poland: On September 18, 1939, the German and Soviet forces completed their invasion and partition of Poland, following the Molotov-Ribbentrop Pact. This event led to the division of Polish territory between the two powers. source: britannica.com
19 Sep Hitler's speech on Poland's fate: On September 19, 1939, Adolf Hitler delivered a speech outlining Germany's plans for Poland following its invasion. This speech emphasized the Nazi regime's intentions and justifications for the occupation. source: britannica.com
20 Sep German army declares Polish campaign complete: On September 20, 1939, the German army officially declared the Polish campaign complete, following the swift invasion and occupation of Poland. This marked a significant early victory for Nazi Germany in World War II. source: britannica.com
21 Sep France completes general mobilization: On September 21, 1939, France officially completed its general mobilization in response to the outbreak of World War II. This mobilization was a significant step in preparing the French military for potential conflict against Germany following its invasion of Poland. source: britannica.com
22 Sep Soviet forces occupy Polish cities: On September 22, 1939, Soviet forces began occupying Polish cities as part of the secret protocol of the Molotov-Ribbentrop Pact. This occupation followed the invasion of Poland by Germany and marked a significant shift in the territorial boundaries of Eastern Europe. source: britannica.com
24 Sep Massive German bombing of Warsaw: On September 24, 1939, German forces conducted massive bombing raids on Warsaw, the capital of Poland. This bombing campaign aimed to demoralize the Polish population and facilitate the German invasion. source: britannica.com
25 Sep Warsaw falls to Nazi Germany: On September 25, 1939, Warsaw officially fell to Nazi Germany after weeks of intense fighting. The fall of the city marked a significant victory for German forces and a devastating loss for Poland during the early stages of World War II. source: britannica.com
26 Sep German Luftwaffe attacks KLM aircraft: On September 26, 1939, the German Luftwaffe attacked a KLM aircraft, marking a significant incident in the early days of World War II. This event highlighted the dangers faced by civilian aircraft during the conflict. source: britannica.com
27 Sep Warsaw falls to German forces: On September 27, 1939, Warsaw officially surrendered to German forces, concluding the Battle of Warsaw. This marked a pivotal moment in the Polish campaign during World War II, leading to the occupation of Poland by Nazi Germany. source: britannica.com
28 Sep Warsaw surrenders to Nazi Germany: On September 28, 1939, Warsaw officially surrendered to Nazi Germany, marking the end of the Polish campaign. This surrender solidified German control over Poland and was a significant event in World War II. source: britannica.com
29 Sep Invasion of Poland by Nazi Germany and Soviet Union: On September 29, 1939, both Nazi Germany and the Soviet Union invaded Poland, marking the beginning of World War II in Europe. This invasion led to the swift defeat of Polish forces and the division of Poland between the two powers. source: britannica.com
30 Sep Polish Government-in-Exile Leadership: On September 30, 1939, the Polish government established itself in exile following the invasion and occupation of Poland. This government aimed to continue the fight against Axis powers and represent Polish interests abroad. source: britannica.com
01 Oct Fall of Warsaw: On October 1, 1939, Warsaw, the capital of Poland, fell to Nazi German forces after weeks of intense fighting. This marked a significant moment in the early stages of World War II, leading to the complete occupation of Poland. source: britannica.com
06 Oct Battle of Kock: Final Combat of September Campaign: The Battle of Kock, fought from October 2 to October 5, 1939, near Kock, Poland, was the final battle of the September Campaign during World War II. The Polish Independent Operational Group Polesie, led by General Franciszek Kleeberg, faced the German XIV Motorized Corps under General Gustav Anton von Wietersheim. Despite initial successes, Polish forces surrendered on October 6 due to exhaustion and lack of supplies, marking the end of organized Polish resistance in the campaign. source: dignitynews.eu
10 Oct Final Polish Military Surrender to Germany: On October 10, 1939, the Polish military officially surrendered to Germany, marking the end of the invasion that began on September 1, 1939. This surrender followed the Soviet invasion of Poland from the east on September 17, leading to the partitioning of Poland between Germany and the Soviet Union. source: en.wikipedia.org
12 Oct World War II Blackout Measures Implemented: On October 12, 1939, Britain implemented blackout measures to protect against potential German air raids. These measures included the darkening of windows and streets to make it more difficult for enemy aircraft to target cities and industrial areas. source: en.wikipedia.org
14 Oct Sinking of HMS Royal Oak: On October 14, 1939, the British battleship HMS Royal Oak was sunk by the German submarine U-47 in Scapa Flow. The attack resulted in the loss of 833 crew members. source: en.wikipedia.org
18 Oct U-47 crew honored by Hitler: On October 18, 1939, the crew of the German submarine U-47 was honored by Adolf Hitler for their successful attack on the British battleship HMS Royal Oak. This event marked a significant moment in the early stages of World War II. source: bbc.com
28 Oct First German Aircraft Shot Down Over Britain: On October 28, 1939, during World War II, the first German aircraft was shot down over Britain. This event marked a significant escalation in the air conflict between Germany and the United Kingdom, as the war expanded beyond continental Europe. source: history.com
31 Oct World War II naval losses: German U-boat casualties: On October 31, 1939, German U-boats faced significant losses during World War II. These casualties were part of the early naval engagements that characterized the conflict, impacting Germany's naval strategy. source: britannica.com
01 Nov Oslo report: critical intelligence leak: On November 1, 1939, a significant intelligence leak occurred in Oslo, revealing critical information about military strategies. This leak had implications for the ongoing war efforts in Europe. source: britannica.com
02 Nov Soviet invasion of Finland: the Winter War begins: On November 2, 1939, the Soviet Union launched its invasion of Finland, marking the beginning of the Winter War. This conflict would last until March 1940 and significantly impact both nations. source: britannica.com
03 Nov Nazi Germany annexes Free City of Danzig: On November 3, 1939, Nazi Germany formally annexed the Free City of Danzig. This action was part of Germany's broader territorial ambitions in Europe during World War II. source: britannica.com
04 Nov US Congress amends Neutrality Act: On November 4, 1939, the United States Congress amended the Neutrality Act, allowing for the sale of arms to belligerent nations. This change marked a shift in U.S. foreign policy during World War II. source: britannica.com
07 Nov World War II: Global tensions escalate: By November 7, 1939, World War II tensions had escalated globally, with significant military engagements and diplomatic developments affecting multiple nations. source: en.wikipedia.org
08 Nov Venlo Incident: On November 8, 1939, British MI6 agents were captured by German Sicherheitsdienst agents near Venlo, Netherlands, leading to a diplomatic incident and the eventual invasion of the Netherlands by Germany. source: en.wikipedia.org
09 Nov Venlo Incident: On November 9, 1939, British MI6 agents were captured by German Sicherheitsdienst agents near Venlo, Netherlands, leading to a diplomatic incident and the eventual invasion of the Netherlands by Germany. source: en.wikipedia.org
13 Nov Polish resistance movement reorganizes: On November 13, 1939, the Polish resistance movement began to reorganize in response to the German occupation. This marked a significant step in the efforts to resist Nazi control and maintain Polish sovereignty during World War II. source: bbc.com
14 Nov Polish Government Establishes Exile Headquarters in London: Following the invasion and occupation of France, the Polish government-in-exile, led by General Władysław Sikorski, relocated its headquarters to London, England, on November 14, 1939. source: holocaustrescue.org
16 Nov Ireland Declares Neutrality: Irish Taoiseach Éamon de Valera officially proclaimed Ireland's neutrality in World War II, a strategic decision that would keep the country out of direct military conflict despite significant international pressures.
06 Dec Battle of Taipale begins in Winter War: The Battle of Taipale commenced on December 6, 1939, during the Winter War between Finland and the Soviet Union. Soviet forces attempted to cross the Taipale River at three locations, aiming to breach the Finnish Mannerheim Line. Despite numerical superiority, the Soviets faced significant resistance from Finnish defenders, leading to a protracted and intense engagement. source: en.wikipedia.org
08 Dec World War II ongoing: As of December 8, 1939, World War II was ongoing, with major conflicts occurring across Europe and Asia. The war had been underway since September 1939, following Germany's invasion of Poland, leading to widespread international involvement and significant global impact. source: en.wikipedia.org
09 Dec Soviet air raid on Helsinki during Winter War: On December 9, 1939, during the Winter War, Soviet aircraft conducted an air raid on Helsinki, the capital of Finland. The attack targeted civilian areas, causing significant damage and civilian casualties, and marked a significant escalation in the conflict between Finland and the Soviet Union. source: en.wikipedia.org
10 Dec First Canadian troop convoy departs for World War II: On December 10, 1939, Canada sent its first troop convoy to Europe to support the Allied forces in World War II. This marked Canada's formal entry into the conflict, contributing significantly to the Allied war effort. source: en.wikipedia.org
11 Dec Anti-Jewish measures implemented in Poland: On December 11, 1939, the German occupation authorities in Poland began implementing anti-Jewish measures, which included restrictions on movement, economic activities, and public life. These measures were part of a broader strategy of persecution that escalated during World War II. source: ushmm.org
12 Dec Winter War: Battle of Tolvajärvi: The Battle of Tolvajärvi, fought on December 12, 1939, was a key engagement in the Winter War between Finland and the Soviet Union. Finnish troops successfully repelled Soviet forces, marking a significant early victory for Finland in the conflict. source: britannica.com
13 Dec Battle of the River Plate: The Battle of the River Plate occurred on December 13, 1939, and was the first major naval engagement of World War II. British forces engaged the German pocket battleship Admiral Graf Spee, leading to a decisive victory for the Allies. source: britannica.com
14 Dec Hitler plans invasion of Denmark and Norway: On December 14, 1939, Adolf Hitler approved plans for the invasion of Denmark and Norway, known as Operation Weserübung. This strategic move aimed to secure German access to Swedish iron ore and to prevent British intervention in Scandinavia. source: britannica.com
15 Dec Uruguay confronts Admiral Graf Spee: On December 15, 1939, the British Royal Navy engaged the German pocket battleship Admiral Graf Spee off the coast of Uruguay. This confrontation marked a significant naval battle early in World War II, leading to the eventual scuttling of the Graf Spee. source: britannica.com
16 Dec Finnish ski troops introduce Molotov cocktails in Winter War: On December 16, 1939, Finnish ski troops began using Molotov cocktails against Soviet tanks during the Winter War. This improvised weapon became a symbol of Finnish resistance against the Soviet invasion. source: britannica.com
17 Dec Canadian troops arrive in Britain: On December 17, 1939, the first Canadian troops arrived in Britain as part of the British Commonwealth's military response to World War II. This marked the beginning of Canada's significant involvement in the war. source: britannica.com
18 Dec Scuttling of the German battleship Graf Spee: On December 18, 1939, the German battleship Graf Spee was scuttled in Montevideo harbor after its defeat in the Battle of the River Plate. This act was a significant moment in naval warfare during World War II. source: britannica.com
19 Dec Soviet attack on Finnish positions during Winter War: On December 19, 1939, the Soviet Union launched a significant attack on Finnish positions as part of the Winter War. This conflict highlighted the fierce resistance of Finnish forces against the larger Soviet military. source: britannica.com
20 Dec Captain Hans Langsdorff's tragic end in World War II: Captain Hans Langsdorff, commander of the German cruiser Admiral Graf Spee, died on December 20, 1939, following the ship's scuttling after the Battle of the River Plate. His death marked a poignant moment in naval warfare during the early stages of World War II. source: britannica.com
21 Dec Nazi leadership appointment: Adolf Eichmann's role in Jewish affairs: On December 21, 1939, Adolf Eichmann was appointed to oversee Jewish affairs in Nazi Germany. This role would later become infamous for his involvement in the logistics of the Holocaust during World War II. source: britannica.com
22 Dec Finnish counter-offensive at Petsamo: On December 22, 1939, Finnish forces launched a counter-offensive at Petsamo during the Winter War against the Soviet Union. This operation aimed to reclaim territory and demonstrate Finnish resilience. source: britannica.com
23 Dec Canadian troops arrive in Britain: On December 23, 1939, approximately 7,500 Canadian soldiers arrived in Britain to reinforce the British Expeditionary Force during World War II. source: timetoast.com
24 Dec Pope Pius XII's Christmas Eve peace appeal during World War II: On December 24, 1939, Pope Pius XII made a Christmas Eve appeal for peace during World War II. source: vaticannews.va
29 Dec Soviet invasion of Finland during Winter War: On December 29, 1939, the Soviet Union launched an invasion of Finland, initiating the Winter War. This conflict lasted until March 1940, resulting in significant territorial losses for Finland. source: britannica.com
30 Dec Admiral Graf Spee scuttled in River Plate estuary: On December 30, 1939, the German battleship Admiral Graf Spee was scuttled in the River Plate estuary off the coast of Uruguay. This event marked the end of the Battle of the River Plate during World War II. source: history.com
31 Dec Finnish Winter War victory: On December 31, 1939, Finland achieved a significant victory in the Winter War against the Soviet Union. This conflict lasted until March 1940, resulting in significant territorial losses for Finland. source: britannica.com

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