Spartacus Educational: Operation Barbarossa
Examines the invasion from the siege of Leningrad in 1941 to the surrender of German troops at Stalingrad in 1943.
www.spartacus.schoolnet.co.uk/RUSbarbarossa.htm
Wikipedia: Operation Barbarossa
Hyperlinked article describing Nazi Germany's invasion of the Soviet Union during World War II.
en.wikipedia.org/wiki/Operation_Barbarossa