World War II is generally considered to have begun on 1 September 1939, when Nazi Germany, under Adolf Hitler, invaded Poland, leading the United Kingdom and France to declare war on Germany. Poland was divided between Germany and the Soviet Union under the Molotov–Ribbentrop Pact.

2025年3月28日 · World War II was a conflict that involved virtually every part of the world during 1939–45. The main combatants were the Axis powers (Germany, Italy, and Japan) and the Allies (France, Great Britain, the United States, the Soviet Union, and China).

2009年10月29日 · World War II, the largest and deadliest conflict in human history, involved more than 50 nations and was fought on land, sea and air in nearly every part of the world.

Discover the pivotal events between 1918 and 1942 that shaped the first half of World War II. This timeline traces that path from the bitter conclusion of the First World War through the...

World War II was the biggest and deadliest war in history, involving more than 30 countries. Sparked by the 1939 Nazi invasion of Poland, the war dragged on for six bloody years until the...

World War II, or Second World War, (1939–45) International conflict principally between the Axis powers—Germany, Italy, and Japan—and the Allied powers—France, Britain, the U.S., the Soviet Union, and China.

2024年5月25日 · World War II (WWII) was a long and bloody war that lasted about six years. Officially beginning on September 1, 1939, when Germany invaded Poland, World War II lasted until both the Germans and the Japanese surrendered to the Allies in 1945.

2021年11月15日 · World War II was the largest and most destructive conflict in history. Learn about key WWII dates in this timeline of events, including when WW2 started and ended.

The aftermath of World War II saw the rise of two global superpowers, the United States (U.S.) and the Soviet Union (USSR).

4 天之前 · World War II was a conflict that involved virtually every part of the world during 1939–45. The main combatants were the Axis powers (Germany, Italy, and Japan) and the Allies (France, Great Britain, the United States, the Soviet Union, and China).