During WWII, the primary tank used by the United States was the Sherman M4. The tank was provided to Russia via the Lend-Lease Act, which supplied the United Kingdom, the Soviet Union, China, France and other allied nations with weapons and military vehicles in return for military bases. In late 1942, the first Sherman tanks sent to Russia were equipped with 75mm guns. Later versions sent in 1944, were armed with 52 caliber 76mm guns. The Russians commended these vehicles reliability and power, which was an asset to them in the Battle of Berlin.