World War 1
Worldwar1.com: Trenches on the Web: Timeline: 1871 1914 Origins of the Great War
Provides a wealth of information about the origins of the World War I, and the maneuvers and alliances that took place in the years preceding it.
Vancouver Island University
Vancouver Island University: Domestic Causes of the First World War
Contains an essay on the "domestic tensions which may have affected diplomatic decision making in 1914."