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History · General

World War II Facts

Key events, figures, and turning points of World War II across the European and Pacific theaters. Front: the term, event, or figure. Back: a one to two sentence explanation of its significance.

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When did Germany invade Poland, starting World War II in Europe?
September 1, 1939. This invasion prompted Britain and France to declare war on Germany two days later, beginning the European conflict.
What was Operation Barbarossa?
Germany's 1941 invasion of the Soviet Union, breaking the Nazi-Soviet non-aggression pact. It was the largest military invasion in history and ultimately proved disastrous for Nazi Germany.
What was the Blitzkrieg strategy?
A German military tactic using fast-moving tanks, aircraft, and infantry to overwhelm enemies quickly. It allowed Germany to conquer Poland, France, and other nations in rapid succession.
What was the significance of the Battle of Britain (1940)?
The Luftwaffe's failed air campaign to gain control of British airspace before a ground invasion. The Royal Air Force's victory prevented German invasion and proved Nazi Germany could be defeated.
What was the Dunkirk evacuation?
The 1940 emergency rescue of over 300,000 Allied troops trapped by German forces in northern France. British civilians and military vessels evacuated soldiers across the English Channel to safety.
What was the Holocaust?
The Nazi genocide of six million Jews, along with millions of others including Roma, disabled people, and political prisoners. It remains history's most systematic attempt at mass extermination.
When did the Soviet Union enter World War II?
June 22, 1941, when Germany launched Operation Barbarossa. The Soviet Union shifted from neutral party to Allied partner and became one of the war's major combatants.
What was the Battle of Stalingrad?
A massive 1942-1943 battle in the Soviet Union where German and Soviet forces fought street-to-street for months. The Soviet victory marked the turning point in the European war.
What was Pearl Harbor?
A U.S. naval base in Hawaii attacked without warning by Japan on December 7, 1941. The attack killed over 1,100 sailors and brought the United States into World War II.
When did the United States enter World War II?
December 8, 1941, the day after Pearl Harbor. Congress voted to declare war on Japan, and Germany and Italy declared war on the U.S. shortly after.
What was the Battle of Midway?
A 1942 naval battle in the Pacific where the U.S. defeated Japan and sank four Japanese aircraft carriers. It shifted naval superiority to the United States and marked a major turning point.
What was D-Day?
June 6, 1944, the date of Operation Overlord, the Allied invasion of Normandy, France. Over 150,000 troops landed on beaches to begin the liberation of Western Europe from Nazi occupation.
What was the island-hopping campaign in the Pacific?
A U.S. military strategy of capturing strategically important islands while bypassing others held by Japan. This approach brought American forces gradually closer to mainland Japan.
Who was Adolf Hitler?
The Nazi leader and Führer of Germany from 1934 to 1945. His aggressive expansionism, antisemitism, and totalitarian policies initiated World War II and the Holocaust.
Who was Winston Churchill?
British Prime Minister from 1940 to 1945 who led Britain through the war. His speeches and steadfast resolve became symbols of Allied determination against Nazi Germany.

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