European theatre of World War II
The European theatre of World War II was one of the two main theatres of combat during World War II, taking place from September 1939 to May 1945. The Allied powers fought the Axis powers on both sides of the continent in the Western and Eastern fronts. There was also conflict in the Scandinavian, Mediterranean and Balkan regions. It was an intense conflict that led to at least 39 million deaths and a dramatic change in the balance of power in the continent.
During the 1930s, Adolf Hitler, the leader of Nazi Germany, expanded German territory by annexing all of Austria and the Sudetenland region of Czechoslovakia in 1938. This was motivated in part by Germany's racial policy that believed the country needed to expand for the pseudoscientific "Aryan race" to survive. They were aided by Italy, another fascist state which was led by Benito Mussolini. World War II started with Germany's invasion of Poland on 1 September 1939, and the Soviet Union, led by Joseph Stalin, joined the invasion later that month. The two nations then partitioned Poland between them.
Poland's allies, France and the United Kingdom, declared war on Germany days after the invasion of Poland but did not want to actually engage in conflict. This changed after Germany invaded Norway, Denmark, France, the Netherlands, Belgium, and Luxembourg. The six countries were taken over, and Germany began two successive aerial bombardments of the United Kingdom, in the Battle of Britain and the Blitz. British prime minister Winston Churchill led his country's war effort. Germany also began a widespread genocide of Jews in the Holocaust. In 1940, Italy invaded Greece, and in 1941, Germany invaded Yugoslavia and Greece. In June 1941, Germany began an invasion of the Soviet Union, breaking the countries' non-aggression pact, and in December 1941 Germany declared war on the United States, shortly after Imperial Japan did so. The United States was led by President Franklin D. Roosevelt.
In 1942, the Soviets stopped further invasion of their country at the Battle of Stalingrad. Meanwhile, the Allies engaged in a mass bombing campaign of German industrial targets. In 1943, the Allied powers began an invasion of Italy, causing the end of Mussolini's regime, but Germans and Italians loyal to the Axis continued fighting. In April 1945, Roosevelt died and was succeeded by Harry S. Truman. The Allies liberated Rome in June 1944. Also in June, the Allied powers began an invasion of German-occupied western Europe, while the Soviets launched a massive counterattack in eastern Europe. Both campaigns were successful for the Allies. The Soviet Union conquered most of Eastern Europe including the German capital Berlin, as Mussolini was hanged and Hitler committed suicide. Concentration camps that were used in the Holocaust were liberated. Germany unconditionally surrendered on 8 May 1945, although fighting continued elsewhere in Europe until 25 May. On 5 June 1945, the Berlin Declaration, proclaiming the unconditional surrender of Germany to the four victorious powers, was signed. The Allied powers then moved to finish the Pacific War against Japan.
Once World War II ended, the Allies occupied the European continent, giving some countries back to their pre-war leaders or creating new governments, before funding their nations' economic recovery. German military leaders were subject to the Nuremberg criminal trials. Western Europe became a series of capitalist governments and eastern Europe became communist, beginning the Cold War among the former Allied nations. Germany was split into the capitalist West Germany and the communist East Germany.
Background
Axis powers
was defeated in World War I, and the 1919 Treaty of Versailles placed punitive conditions on the country after finding Germany and the other Central Powers guilty for starting the war. These punishments included the loss of Alsace-Lorraine, the temporary loss of the Saarland, military limitations, and reparation payments to the Allied powers. The Rhineland region of Germany was also made a demilitarised zone. Germany would also join the League of Nations, an international governmental body devoted to peacekeeping. Historians are divided on whether or not the treaty was harsh or actually "very restrained" compared to other peace treaties at the time. Many Germans back then blamed their country's post-war economic collapse on the treaty's conditions and these resentments contributed to the political instability, which made it possible for Adolf Hitler and his Nazi Party to come to power. This was worsened by the worldwide Great Depression, which began in 1929.Hitler became the chancellor and fuhrer of Germany in 1933. In February 1933, the German Reichstag building caught on fire in an arson attack, giving Hitler the opportunity to blame the fire on his political opponents, especially communists. In response, the government passed the Decree of the Reich President for the Protection of the People and State, which "abolished freedom of speech, assembly, privacy and the press; legalized phone tapping and interception of correspondence; and suspended the autonomy of federated states, like Bavaria". Communist politicians were arrested, leaving the Nazi Party free to do what they wanted. Hitler made Germany an absolute dictatorship, and he withdrew from the League of Nations. In 1934, during the Night of the Long Knives, Hitler ordered the purge of leaders within the Nazi Party's Sturmabteilung paramilitary organisation, believing them to have gotten too powerful.
From 1919 to 1921, Italian fascist Benito Mussolini grew a base of supporters who wanted him to deal with Italy's political and economic crises, which involved civil conflict over the growth of socialism in the country. Many of Mussolini's supporters became known as blackshirts, who would form a paramilitary that terrorised the Italian countryside in a campaign against socialism. In 1922, during a controversial general strike by a weakened trade unionist movement, Mussolini and his followers seized power in Rome and installed him as the Prime Minister of Italy to run the country alongside the pre-existing monarchy of King Victor Emmanuel III. Similar to Germany, Mussolini turned the country into a one-party fascist state which outlawed free speech, the free press, trade unions, and targeted socialists, Catholics, and liberals with a network of secret police and spies. Italy became sympathetic to Nazi Germany in the 1930s.
File:Celebration of the Japan-Germany-Italy-Triparite-Pact in Tokio.jpg|thumb|A celebration at the 1940 Tokyo signing of the Tripartite Act defence agreement between Nazi Germany, Imperial Japan, and Fascist Italy; their flags are present|upright=1.36
Italy, Germany, and Imperial Japan — led by Emperor Hirohito and Prime Minister Hideki Tojo — increasingly allied with each other, and during World War II they would be known as the Axis powers. Italy and Japan needed allies, as Italy was involved in the Second Italo-Ethiopian War from 1935 to 1937, and Japan started the Second Sino-Japanese War in 1937, the latter of which was subsumed by World War II and ended in 1945.
In 1936, Italy and Germany made a pact of mutual assurance, the Rome-Berlin Axis agreement. Also that year, Japan and Germany signed the Anti-Comintern Pact to counter the perceived threat of communism from the Soviet Union led by Joseph Stalin; Italy joined the pact in 1937. Italy and Germany signed the Pact of Steel in 1939, formalising the Rome-Berlin axis. Other smaller powers joined the Axis throughout World War II. The Axis' main opponents would be the Allies, a name reused from the Allies who were the main opponent of the Central Powers in World War I.
Nazi social policies
Under the Nazi Party, Germany developed a hierarchy which considered the pseudoscientific "Aryan race" — white ethnic Germans or those closest genetically to them – as the most superior race, and Jews and Slavs at or near the bottom. A major part of Nazi Germany's racial policy was the concept of lebensraum, or "living space": increasing the amount of land in Europe where members of the Aryan race could live. The United States Holocaust Memorial Museum writes:File:Greater Germanic Reich.png|thumb|The boundaries of the "Greater Germanic Reich" that the Nazi Party planned to be occupied by the "Aryan race", who were alleged to require "living space" in Europe beyond Germany's borders|300x300pxThis formed a key motivation of Germany's expansion in Europe in the mid-to-late 1930s. In 1934, Germany signed a non-aggression pact with Poland, but this would not last as Poland was considered a part of the lebensraum; Nazi mythology considered eastern Europe to be lost German land. In 1933, Germany began building concentration camps to hold their political enemies and those they considered "degenerates", such as people on the lower end of their racial hierarchy, the Nazi Party's political enemies, Poles, Romani people, Jehovah's Witnesses, Freemasons, disabled people, and LGBTQ people. They were brought from many places across lower continental Europe to the camps using the extensive railway network which crossed the continent. The mass killing of the camps' prisoners, which started as soon as they were built, expanded in 1941, which is usually when the start date of the Holocaust is given. In 1938, during the Kristallnacht pogroms, 30,000 Jews were sent to concentration camps.
In 1938, German chemists Otto Hahn and Fritz Strassman discovered nuclear fission, or the release of large amounts of energy when an atom's nucleus splits into smaller nuclei. German scientists of the Uranverein then began a project to develop the atomic bomb, a bomb using nuclear fission that could destroy entire cities. This was supposed to be secret, but scientists fleeing Nazi Germany to avoid persecution made word of the program in other Western countries. In 1939, United States President Franklin D. Roosevelt was warned of the program by one of these fleeing scientists, Albert Einstein.