How the Soviet Union set the stage for the Winter War

History · Published 3 October 2026 Swipe more like this →

In short: Explore the strategic origins of the 1939 conflict between Finland and the USSR. This documentary examines the motivations behind the invasion, the formation of the Mannerheim Line, and the initial military movements.

This animated documentary by Leif Sick details the buildup to the Winter War. It explores the underlying reasons for the outbreak of hostilities, the deployment of troops, and the defensive construction of the Mannerheim Line.

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