The 45 mm anti-tank gun model 1937 was a light quick-firing anti-tank gun used in the first stage of the German-Soviet War. It was created by Soviet artillery designer M.N. Loginov after the arrest and execution of former designer V. von Behring. Production of the gun ceased in 1943 with a total of 37,354 units built from 1937 to 1943.
The Budapest offensive was the general attack by Soviet and Romanian armies against Nazi Germany and their Axis allies from Hungary. The offensive lasted from 29 October 1944 until the fall of Budapest on 13 February 1945.