What lead to WW1 By chasecov Jun 28, 1914 assassination of archduke Franz Ferdinand in Sarajevo Jul 2, 1914 Russia declared war on Austria-Hungary Germany agreed to help Austria-Hungary and encouraged the war Jul 28, 1914 Austria-Hungary declared war on Serbia Aug 1, 1914 Germany declared war on Russia Aug 3, 1914 Germany declared war on france France wat war by treaty Aug 4, 1914 Britain declared war on Germany Aug 23, 1914 Japan declared war with Germany Aug 25, 1914 Austria-Hungary declares war on japan Apr 26, 1915 Italy joined war Apr 6, 1917 United states enterd war Aug 14, 1917 China Declared war with Germany
