World War II
World War II, or the Second World War (often abbreviated as WWII or WW2), was a global conflict that was underway by 1939 and ended in 1945. It involved most of the world’s nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, with more than 100 million people serving in military units. In a state of “total war”, the major participants placed their entire economic, industrial, and scientific capabilities at the service of the war effort, erasing the distinction...
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World War I (WWI), which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918. It involved all the world’s great powers, which were assembled in two opposing alliances: the Allies (based on the Triple Entente of the United Kingdom, France and Russia) and the Central Powers (originally centred around the Triple Alliance of Germany, Austria-Hungary and Italy; but, as Austria–Hungary had taken the offensive...
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