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Germany invades Poland, starting World War II.
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Great Britain and France declare war on Germany.
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Italy enters the war as an ally of Germany and a member of the Axis powers.
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Germany begins to launch daily aerial strikes against Great Britain. The attacks last until the end of October and are known as the Battle of Britain.
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Germany, Italy, and Japan sign the Tripartite Pact, creating the Axis Alliance.
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Germany and the Axis Powers attack Russia with a force of over four million troops.
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Japan attacks the US Navy in Pearl Harbor.
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The United States enters the war on the side of the Allies.
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The United States Navy defeats the Japanese Navy at the Battle of Midway.
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Allies invade and take the island of Sicily.
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Italy surrenders to the Allies, removing them from World War II.
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D-Day and the Normandy invasion. Allied forces invade France and push back the Germans.
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Paris is Liberated from German control.
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Germany launches a huge offensive at the Battle of the Bulge. Germany loses to the Allies, finalizing the defeat of the German army.
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US Marines invade the island of Iwo Jima, capturing it for the United States after a fierce battle.
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Germany surrenders to the Allies.
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The United States drops an Atomic Bomb on the city of Hrishima, completely devastating the city.
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The United States drops a second Atomic Bomb on the city of Nagasaki.
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Japan surrenders to the United States and the Allies, ending the war in the Pacific and World War II.