The History Place
The History Place: Hitler Named Leader of Nazi Party
This site from The History Place provides information about Hitler's leadership when he is named leader of the Nazi party in 1921. This is a good site to check out on the subject.
Other
Tsu: The Progressive Era and World War I
A comprehensive outline covering the major ideas, leaders, and actions of the Progressive Era and the transformation of the United States as a result of World War I.
Flow of History
Flow of History: The Road to World War Two (1939 45)
Teacher-created site that examines the flow of events that led to the outbreak of World War II.
Library of Congress
Loc: A Guide to World War I Materials
A web guide of links to World War I resources throughout the Library of Congress web site and beyond.