A world war is an international conflict that involves most or all of the world's major powers. Conventionally, the term is reserved for the two major international conflicts that occurred during the
United States Army infantry supported by a M18 tank destroyer advancing through a German-occupied Brest, France, during World War II
French Army soldiers holding a position in the ruins of a church during the Second Battle of the Marne, part of World War I
A British Army Churchill tank passing a destroyed Wehrmacht Panzer IV tank during Operation Overlord, part of World War II
U.S. Army paratroopers landing in a field in West Germany during Exercise Reforger 1984, a Cold War-era NATO military exercise used to prepare for potential conventional warfare against the Warsaw Pact; such a conflict was expected to be World War III.
World War I, or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. One of the deadliest conflicts in history, World War
World war
…major powers. Conventionally, the term is reserved for the 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). Some historians have also characterized other global conflicts as world wars, such as the Seven Years' War…
British 39th Siege Battery RGA Somme 1916
American troops going forward to the battle line in the Forest of Argonne. France, September 26, 1918. NARA 530748