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

第二次世界大戰，简称 二战，是1939年至1945年爆發的全球 軍事衝突。 第二次世界大战涉及 全球絕大多數的國家，包括所有的 大國，并最終分成兩個彼此對立的 軍事同盟 —— 同盟國 和 軸心國。 這次戰爭是人類史上 規模最大的戰爭，各国动员至少1億多名軍人參與這次軍事衝突。 主要的參戰國紛紛宣布進入 總體戰 狀態，幾乎將自身國家的全部經濟、工業、 科學技術 用於戰爭之上，同時將民用和軍用的資源合併以便規劃。 第二次世界大戰也是有紀錄以來最多大規模民眾 …

2 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). It was the bloodiest conflict, as well as the largest war, in human history.

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. Also known as the Second...

2 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).

Sparked by the 1939 Nazi invasion of Poland, World War II pitted the Allied forces (led by the United States, Great Britain and the U.S.S.R.) against the Axis powers (Nazi Germany, Japan and...

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.

2025年3月5日 · Europe After World War II (1945 to c. 1989) Simeon Netchev (CC BY-NC-ND) While free and democratic elections were encouraged in the western half of Europe, the eastern half became the USSR's "exclusive zone, a satellite empire" (Dear, 204). Germany was divided into East Germany and West Germany, with the USSR controlling the former and ...

World War II, or the Second World War was a global military conflict that was fought between September 1, 1939, and September 2, 1945. The war pitted two major military alliances against each other: the Allies of the United States, Soviet Union, United Kingdom, China and others against the Axis of Germany, Japan, Italy and others.

This article provides a comprehensive overview of World War II, delving into its causes, key events, major players, and its profound impact on societies, politics, and economies worldwide. Causes of World War II: The seeds of World War II were sown in the aftermath of World War I.