Question

How First World war was broke out ?Explain

Answer 1

The direct cause of WWI was the assassination of Archduke Franz Ferdinand at Sarajevo on 28 June 1914. However historians feel that a number of factors contributed to the rivalry between the Great powers that allowed war on such a wide-scale to break out.

Answer 2

World War I began in 1914, after the assassination of Archduke Franz Ferdinand, and lasted until 1918. ... By the time the war was over and the Allied Powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.