2 Background causesImperialism - Germany felt it deserved more colonies in Africa and AsiaNationalism - Europeans had strong feelings of pride toward their own countriesMilitarism - belief that a nation needs a large militaryAlliances - Europe had divided into two opposing alliances: Central Powers - Austria-Hungary, Germany, the Ottoman Empire, and Bulgaria, Allies - Serbia, Russia, France, Great Britain, and Italy
3 Event that started WWIJune 28, 1914 Serbian shot and killed Archduke Franz Ferdinand, heir to Austria-HungaryAustria declared war on Serbia, war began
5 How WWI was foughtTrench warfare - troops stayed in trenches and fired at each other. Trenches stretched across France to SwitzerlandAlso used: tanks, machine guns, poison gas, airplanes, and U-boats (German submarines)
11 America’s Path to WarPres. Wilson wanted a policy of neutrality (refusing to take sides)May 1915, German U-Boat torpedoed the British ship Lusitania, turning many Americans against Germany
12 Zimmermann Telegram Discovered by the British Zimmermann Telegram Discovered by the British. Germany wanted Mexico to join war. In return, Germany would help Mexico their territories back from America.March German submarines sank three American ships. Pres. Wilson declared war in April.