T-26 - Soviet light tank. The most numerous tank of the Red Army by the beginning of Great Patriotic War and the Army of the Spanish Republic of the Civil War in Spain, the second largest Soviet tank produced after the T-34 in the 1930s - 1940s. Created on the basis of the British Vickers Mk E tank (also known as the Vickers 6-ton), purchased in 1930. It was put into service in the USSR in 1931