4 links
Historical Atlas of the 20th Century
users.erols.com
Includes socio-economic trends, population and war statistics, and listings of world leaders.
People's Century
pbs.org
History of the people, for the people, as told by the people who lived it. From PBS.
Rpfuller.com: GCSE History Notes
rpfuller.com
GCSE revision notes, covering Germany, the Treaty of Versailles, interwar diplomacy, the causes of World War II, Russia, and the Cold War.
World History
members.aol.com
Articles on Imperialism, the Russian Revolution, World War I, World War II, the Cold War, and the Korean and Vietnam conflicts.