On November 30, 1939, the Soviet Union's Red Army invaded the young nation-state of Finland, in the full expectation of routing the small, ill-equipped Finnish army and annexing the former Russian territory by the end of the year. But Finland held out for 105 bitterly cold, fiercely combative days, until March 15, 1940, when a peace agreement ended the short, savage Winter War. At the stirring center of the story lie the resourcefulness and resolve...

In 1939, tiny Finland waged war-the kind of war that spawns legends-against the mighty Soviet Union, and yet their epic struggle has been largely ignored. Guerrillas on skis, heroic single-handed attacks on tanks, unfathomable endurance, and the charismatic leadership of one of this century's true military geniuses-these are the elements of both the Finnish victory and a gripping tale of war. William R. Trotter was raised in Charlotte, North Carolina,...