Comparing: Stuart I-IV vs. BT-7 artillery

Mass-produced from 1941 and supplied to the U.K. under Lend-Lease. A a total of 6,889 were supplied to the British from M3 to M5A1 variants. The M3 tanks were designated Stuart I by the British, while the M3A1 version was designated Stuart III. They first saw action in the battle at Sidi Rezegh.

In 1934–1935 the design bureau of the Kharkiv Locomotive Factory developed this artillery modification of the BT-7. The new elliptical turret was equipped with the 76.2-mm CT-28 gun. In addition, some vehicles received new radio stations. A total of 155 artillery BT-7s were manufactured. The vehicles saw combat on the Karelian Isthmus, in Manchuria, and during the first period of the Great Patriotic War.