Which of these conflicts started in 1914 and lasted until 1918?

World War I (WWI or WW1), also known as the First World War, was a global war centered in Europe that began on 28 July 1914 and lasted until 11 November 1918. From the time of its occurrence until the approach of World War II, it was called simply the World War or the Great War, and thereafter the First World War or World War I.

Source: Mansfield, TX