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.

Apr 9, 2025 · 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 …

Oct 29, 2009 · 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.

4 days ago · 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).

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 …

Oct 29, 2009 · 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.

Apr 11, 2019 · What caused World War I and what were its effects? Also called The Great War, World War I was one of the deadliest conflicts in history, and set the stage for another world war just 20 years...

Apr 1, 2025 · An estimated 240,000 people were killed or went missing in the Battle of Okinawa during World War II. Eighty years later, the scars remain, allowing visitors to get up close and touch history.

This timeline traces that path from the bitter conclusion of the First World War through the ascendancy of the Nazi party to America’s entry into the global conflict.