World War I was the biggest war of the 20th century. It started with an assassination and involved more countries than any war in history. Many European countries made agreements with each other and fought for four years. Although while in the war 9 million soldiers and 6 million civilians lost their lives in the war. On June 28, 1914 Archduke Franz Ferdinand was murdered in Sarajevo. Many thought that Serbia was behind the killing of Archduke Franz Ferdinand so then they started declaring war. Meanwhile Germany had become a powerful nation in Europe.and there army became bigger and stronger. So they began the war between several countries but the only way they knew how to battle was to stand in a line and one team fire and then