Conventionally, the term is reserved for two major international conflicts that occurred during the first half of the 20th century, World War I (1914–1918) and World War II (1939–1945), although some historians have also characterized other global conflicts as world wars, such as the Nine Years' War, the War of the Spanish Succession, the ...

World War I [b] or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a global conflict between two coalitions: the Allies (or Entente) and the Central Powers.

World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war.

2025年1月22日 · World War I, international conflict that in 1914–18 embroiled most of the nations of Europe along with Russia, the U.S., the Middle East, and other regions. It led to the fall of four great imperial dynasties and, in its destabilization of …

2009年10月29日 · World War I, also known as the Great War, started in 1914 after the assassination of Archduke Franz Ferdinand of Austria. His murder catapulted into a war across Europe that lasted until 1918.

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.

World War I saw the debut of the tank and chemical weapons, the widespread use of machine guns and aircraft, improvements in artillery, and the pinnacle of the age of battleships. Military aviation advanced rapidly during the war, and dogfighting pilots won fame far …

World War I pitted Germany, Austria-Hungary and the Ottoman Empire against Great Britain, the United States, France, Russia, Italy and Japan. New military technology resulted in unprecedented...

2025年1月9日 · The Austro-Hungarian, Russian, Ottoman, and German Empires were dismantled after World War I, while World War II led to the downfall of the Axis Powers (Germany, Italy, and Japan). Decolonization: World War II was a catalyst for decolonization, as European powers weakened by the war were unable to maintain control over their colonies. This led ...