The Soviet-Finnish War of 1939–1940, often called the “Winter War,” is one of the most unknown wars of the 20th century. It lasted only three and a half months and formally ended with the victory of the Red Army. But in our country they don’t like to remember it.

The book by the famous historian Boris Sokolov lifts the veil of secrets hiding the truth about the “Winter War,” which became the prelude to the Great War of 1941–1945.