World War I, known as the "war to end all wars," occurred between July 1914 and November 11, 1918.

A timeline of events preceding the start of the First World War: June 28, 1914: Archduke Franz Ferdinand, heir to the Austrian throne, and his wife, visit Sarajevo in Bosnia. Hitler wanted to take Poland but knew that now was his best chance. Austria believes the killer is linked to the Serbian nationalist movement. By the end of the war, over 17 million people had been killed, including over 100,000 American troops. A lone assassin shoots and kills them both. Events that led to the start of World War 1; 28th June 1914 - Murder of Austria-Hungry archduke Franz Ferdinand In Sarajevo By Gavrilo Princip a Serbian Student. He was convinced that Britain wouldn’t declare war on Germany on it’s own, and wanted … One of the events leading up to WW2 was the non-aggression pact between the Nazis and the soviets.