European theatre of World War II

European theatre of World War II was the main theatre of combat during World War II, encompassing a vast series of interconnected conflicts across the continent and its periphery. It began with the German invasion of Poland in September 1939, which prompted declarations of war by France and the United Kingdom, and concluded with the German Instrument of Surrender in May 1945. The theatre pitted the Axis powers, led by Nazi Germany, against the Allies, ultimately including the Soviet Union, the United States, and the British Empire, in a total war of unprecedented scale and brutality.

Background and outbreak

The roots of the conflict lay in the unresolved tensions of the Treaty of Versailles and the rise of aggressive totalitarian regimes in the 1930s. Adolf Hitler's Nazi Germany pursued a policy of territorial expansion, or Lebensraum, beginning with the Anschluss with Austria and the dismemberment of Czechoslovakia following the Munich Agreement. The immediate catalyst was the Molotov–Ribbentrop Pact, a non-aggression treaty between Germany and the Soviet Union that contained a secret protocol dividing Eastern Europe into spheres of influence. On 1 September 1939, Germany launched its invasion of Poland using Blitzkrieg tactics; this was followed by the Soviet invasion of Poland from the east sixteen days later, in accordance with the pact. The United Kingdom and France, honoring their guarantees to Poland, declared war on Germany, marking the definitive start of the wider war in Europe.

Major campaigns and battles

The theatre witnessed a succession of major campaigns that defined its course. The initial period, known as the Phoney War, ended with the decisive German offensives in 1940: the Norwegian Campaign, the Battle of France, and the Battle of Britain. Following the failure to subdue the United Kingdom, Hitler turned east, launching the massive Operation Barbarossa against the Soviet Union in June 1941. This opened the Eastern Front, the largest and bloodiest theatre of war, featuring pivotal battles like the Siege of Leningrad, the Battle of Moscow, the Battle of Stalingrad, and the Battle of Kursk. In the Mediterranean and North Africa, campaigns such as the North African campaign and the Allied invasion of Sicily were crucial. The Western Front was re-opened with the Normandy landings (Operation Overlord) in June 1944, leading to the Liberation of Paris and the climactic Battle of the Bulge before the final Allied advance into Germany.

Occupation, resistance, and collaboration

German and Axis occupation regimes across Europe, from Vichy France to the General Government in Poland, were characterized by brutal exploitation and repression. This spurred widespread, though varied, resistance movements, such as the Polish Underground State, the French Resistance, and Yugoslav Partisans. Resistance activities included intelligence gathering, sabotage, and partisan warfare, most notably the Warsaw Uprising. Simultaneously, collaboration with the occupying powers was widespread, taking forms ranging from the ideological alignment of regimes like the Quisling regime in Norway to industrial and administrative cooperation by individuals and companies across occupied territories.

The Holocaust and war crimes

The theatre was the primary site of the Holocaust, the systematic, state-sponsored genocide perpetrated by Nazi Germany and its collaborators. Six million Jews were murdered in extermination camps like Auschwitz-Birkenau, Treblinka, and Sobibor, as part of the Final Solution. Millions of other civilians, including Romani people, Slavs, and political dissidents, were also targeted for persecution and murder. Widespread war crimes included the Massacre of Kalavryta, the Oradour-sur-Glane massacre, the Katyn massacre (perpetrated by the Soviet NKVD), and the brutal treatment of prisoners of war on the Eastern Front. These atrocities were central to the subsequent Nuremberg trials and other post-war tribunals.

Allied victory and aftermath

The final collapse of Nazi Germany came with the Western Allied invasion of Germany and the massive Soviet offensive in the east, culminating in the Battle of Berlin. Hitler's suicide was followed by the unconditional surrender of all German forces, signed at Reims and Berlin-Karlshorst in early May 1945. The aftermath was dominated by the Potsdam Conference, which established the framework for the occupation of Germany and the redrawing of European borders, notably the westward shift of Poland. Europe was left physically devastated and politically divided, ushering in the period of Cold War tension between the Western Allies and the Soviet Union, symbolized by the new Iron Curtain. The war's profound legacy led to the creation of institutions like the United Nations and catalyzed movements towards European integration.

Category:World War II theatres and campaigns Category:Military history of Europe