WWI officially broke out.
More: World War I - Wikipedia, the free encyclopedia
World War I*(WWI*or*WW1), also known as the*First World War, was a*global war*centred 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.[5][6][7]*In America, it was initially called the*European War.[8]*More than 9*million*combatants*were killed, a casualty rate exacerbated by the belligerents' technological and industrial sophistication, and tactical stalemate. It was*one of the deadliest conflicts in history, paving the way for major political changes, including revolutions in many of the nations involved.[9]
More: World War I - Wikipedia, the free encyclopedia