WW1 By qviki Jun 28, 1914 The assassination of Archduke Franz Ferdinand An archduke of Austria-Este and Royal Prince fo Hungary and Bohemia. Jul 28, 1914 Austria-Hungary declared war on Serbia The proper response was a call for a possible preparation for a military for invasion. Aug 4, 1914 Germany invaded Belgium and started the fighting Sep 6, 1914 -9 The allies stopped the Germans in France in the First Battle ofMarne. Oct 5, 1914 First German aircraft shot down by allied plane. The Viosin lll was the first plane to shoot down an enemy. Jul 1, 1916 The Allies started the Battle of the Somme Apr 6, 1917 The United States declared war on Germany Jun 24, 1917 American troops began landing in France Mar 3, 1918 Russia signed the Treaty of Brest-Litovsk Nov 11, 1918 End of WW1