To the 75th anniversary of the Soviet-Finnish War, which the veterans themselves often called “Winter”. The whole truth about the feat and tragedy of the Red Army, which, at the cost of huge losses, won one of the most difficult victories in our history over a powerful enemy. An in-depth analysis of the course of hostilities, supplemented by detailed information about all tank units that fought both on the Karelian Isthmus and north of Ladoga. “Tanks are breaking through the wide clearings...” - sang in the famous march “Receive us, Suomi beauty!” Why, having a 30-fold superiority in armored vehicles, was the Red Army unable to defeat the enemy with “little bloodshed”? What explains the huge losses of Soviet tanks - about 3,500 vehicles? How did you manage to turn the situation around in a matter of weeks, training the infantry not to be afraid of their tanks, and the sappers not to be afraid of our artillery fire? How have assault, blocking and mobile tank groups proven themselves in the most difficult conditions of lake-forested-swampy terrain, meter-thick snow cover and 50-degree frosts? Thanks to whom, brutal defeats (what was the cost of the defeat of the 34th Light Tank Brigade alone!) were replaced by victorious tank operations, such as the February breakthrough of the main defense line of the “Mannerheim Line” in the area of \u200b\u200bheight 65.5 or crossing the ice of the Gulf of Finland and capturing a strategic bridgehead, cutting the Vyborg-Helsinki highway?..Answering the most difficult and painful questions, this book pays tribute to the feat and skill of the Red Army.