A book on the history of the creation and development of a whole series of domestic BT wheeled tracked tanks, originating from the tank M.1940 the American designer J.W. Christie. Details are given about the reasons for the purchase of the tank & # 96; Christie & # 96; and its further refinement by domestic designers. The book presents serial modifications of BT tanks, as well as various combat and support vehicles created on their basis. In addition, the most interesting projects of machines that were not embodied in metal were considered. Examples of the combat use of BT tanks in Spain, near Lake Khasan, on the Khalkhin-Gol River, in liberation campaigns in Western Belarus and Western Ukraine, during the Soviet-Finnish war in the winter of 1939-1940, during the Great Patriotic War and the war with Japan. The book includes a large number of illustrations, many previously unpublished. A book about the history of the Soviet T-34 tank, created before the Great Patriotic War. The tank was used from the first to the last day of the war. Numerous modifications and experimental machines based on T-34 are described in detail. The combat path of the tank during the war years is scrupulously tracked. The book includes a large number of illustrations, many previously unpublished. The publication is designed for a wide range of readers interested in the history of World War II.