Long Term Causes of World War I Imperialism Militarism Nationalism The alliance system
The Alliance System Triple Alliance GermanyItaly Austria- Hungary Triple Entente Great Britain FranceRussia
The War Begins Archduke Franz Ferdinand of Austria- Hungary is assassinated by the terrorist Gavrilo Princip of Yugoslavia Austria- Hungary then gave Serbia an ultimatum, which they refused
One Week That Started a Warin 1914 July 28- Austria- Hungary declares war on Serbia July 29- Russia declares war on Austria- Hungary August 1- Germany declares war on Russia and warns England and France not to interfere August 3- Germany declares war on France August 4- England declares war on Germany
Opposing Forces Central PowersAllied Powers GermanyGreat Britain Austria- HungaryFrance BulgariaRussia Ottoman EmpireSerbia
Map of Opposing Forces
New Weapons and Methods of Fighting Tanks Poison gas U-boats Sonar Trench warfare