America M10 Tank Destroyer wound up being provided to Uk forces through Lend-Lease, an application of aid to nations at war against Germany in addition to its allies. Its main armament wound up being considered under-performing by the British, whom replaced the 3'' tool with the AT 17-pounder which has been presently set up on Firefly Sherman tanks. The M10 had its baptism of fire during the Battle of Normandy"