(1914-1918) War that involved every superpower of that time where the Triple Alliance was pitted against the Triple Entente due to growing nationalism. Triggered by the assassination of Archduke Franz Ferdinand, heir to the Austrian throne, by a Serbian nationalist (June 28, 1914). On July 28, 1914 war was officially declared. The war ensued becoming a war of attrition and trench warfare. Conscription was used, as well as colonial troops, propaganda, and the roles of women at home increased; in the end about 10,000,000 soldiers died. Ethnic violence such as the Armenian Genocide occurred. The US got involved in 1917, allies to the Tripe Entente, after Lusitania and the Zimmerman Telegram. Outcomes of the war were The Treaty of Versailles, Woodrow Wilson's 14 Points, and the League of Nations. an event concentrated in Germany that was the mass murder of races that Germans found in their society to be "inferior", mainly the Jews (Slavs, POWs of Allies, handicapped, homosexuals, communists, Gypsies, Jehovah's Witnesses). People were sent to death camps, the most famous of which were Auschwitz, Dachau, and Bergen-Belsen.