World War II Timeline By deaa_moore Sep 1, 1939 The Invasion of Poland Marked the beginning of World War II, using a swift "blitzkrieg" attack that overwhelmed Polish defenses with tanks and air power. Sep 3, 1939 Great Britain and France Declare War on Nazi Germany May 10, 1940 The Invasion of Belgium, Luxembourg, Netherlands & France May 27, 1940 The Battle & Great Escape at Dunkirk Jul 10, 1940 The Battle of Britain Sep 16, 1940 Selective Service & Training Act Mar 11, 1941 Lend-Lease Assistance Act Dec 7, 1941 The Attack on Pearl Harbor Dec 8, 1941 America Enters World War II Dec 11, 1941 Germany and Italy Declare War on the United States May 4, 1942 The Battle of the Coral Sea Jun 4, 1942 The Battle of Midway Island Nov 8, 1942 The Invasion of North Africa Jul 9, 1943 The Invasion of Sicily & Italy Jun 6, 1944 The D-Day Invasion of France Jul 24, 1944 Nazi Concentration Camps Discovered Sep 2, 1944 V-J (Victory over Japan) Day Dec 16, 1944 The Battle of the Bulge Feb 4, 1945 The Yalta Conference May 8, 1945 V-E (Victory in Europe) Day Aug 6, 1945 The Atomic Bomb on Hiroshima Aug 9, 1945 The Atomic Bomb on Nagisaki
Marked the beginning of World War II, using a swift "blitzkrieg" attack that overwhelmed Polish defenses with tanks and air power.