events that lead to WORLD WAR 1 By wilkinsne Jan 1, 1866 germany joined the war with austria Jan 1, 1914 france entered the war again in Jun 28, 1914 the assassinition of Austria-Hungarys's heir the first event that made a arugment between them sebira Jul 28, 1914 serbia declared war on ausrtia-Hungary Aug 1, 1914 germany allied with Austria Aug 3, 1914 france and russia allied Aug 4, 1914 france and russia declared war on germany Aug 4, 1914 beligum also got involved in the war with russia france and germany Aug 23, 1914 japan declared war on germany May 1, 1915 italy joined the war with germany Apr 6, 1917 united states joined the war
