Describe the progress of the war from 1914 through 1916.

World War I (WWI), which was 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.

By the war's end, four major imperial powers-the German, Russian, Austro-Hungarian and Ottoman Empires-had been militarily and politically defeated and had ceased to exist. The former two states lost a great amount of territory, while the latter two were dismantled entirely. The European nationalism spawned by the war and the breakup of empires, the repercussions of Germany's defeat and problems with the Treaty of Versailles are generally agreed to be factors in the beginning of World War II.