world war i began in which year world war i began in world war i began in 1914 and ended in world war i began as a conflict between nations in world war i began in europe in the year world war i began with the assassination of world war i began when austria hungary attacked world war i began after the assassination of world war i began in 1914 world war i began in 1914 and involved world war i began world war i began june 24 1944. true false world war i began june 24 1944 world war 1 began world war 2 began after world war ii things began to change shanghai 1937 where world war ii began on this day 1914 world war i began on this date july 28 1914 world war i began world war i from how it began and finished