What factors led to world war 1?

World War I occurred between July 1914 and November 11, 1918. By the end of the war, over 17 million people had been killed, including over 100,000 American troops. While the causes of the war are infinitely more complicated than a simple timeline of events, and are still debated and discussed to this day, the list below provides an overview of the most frequently-cited events that led to war. read more

Video: Causes of World War I: Factors That Led to War Although World War I began in Europe, it is important to take a look at World War I in relation to U.S. history as well. The U.S. was greatly affected by the war. read more

A: There were four main causes of World War I: militarism, alliances, imperialism and nationalism. The first world war was a direct result of these four main causes, but it was triggered by the assassination of the Austrian archduke Franz Ferdinand and his wife. read more