Adolf Hitler

World War II and Military Campaigns

Hitler's aggressive foreign policy and expansionist ideology led to the outbreak of World War II.

Invasion of Poland

1 September 1939

Germany invaded Poland, prompting the United Kingdom and France to declare war.

Western Campaign

1940

Germany launched successful campaigns in Western Europe, conquering France, Belgium, and the Netherlands.

Operation Barbarossa

22 June 1941

Germany invaded the Soviet Union, opening the Eastern Front.

Declaration of War on the United States

11 December 1941

Following Japan's attack on Pearl Harbor, Hitler declared war on the United States.