Soviet Union

1941 - Contains a breakdown of battles by area, along with maps and numbers of soldiers, tanks, and airplanes involved. Also in Russian.

Battle of Moscow - Discusses the German attack and Russian defence of Moscow and counteroffensive during 1941-1942 campaign on the Eastern Front. Also available in Russian.

Operation Barbarossa - Describes the Eastern front campaign from 1941-1945 including the history, order of battles, tactics, organization, wargames and other related resources.

Wikipedia: Battle of Sevastopol - Includes battle overview and related information.

World War II in Ukraine - Describes the Ukrainian experience of World War II.