First World War
First World War: The Causes of World War One
The causes of World War One and the countries involved are included in this extensive summary.
BBC
Bbc History: World Wars: World War One: Origins of World War One
A five-part overview of the causes of World War I.
Brigham Young University
Wwi Archives: Commentaries on the Battle of Verdun: Lord Northcliff on Verdun
These are Lord Northcliffe's commentaries on the WWI Battle of Verdun, discussing the causes, phases, and results of this battle. (4 March 1916)
Curated OER
History Matters: "Says Lax Condidtions Caused Race Riots"
Read several articles from the Chicago Daily News on July 28, 1919, reporting on the various aspects of the Chicago race riots. One article, by Carl Sandburg, used sources from the black community.
Other
Lebensraum: Living Space for the German Race
Resource provides a discussion of the concept of "Lebensraum," or "living space" for the German people. This was one of Hitler's main justifications for his military conquests.