United States, 1941-1944 (150MB Download, please be patient!)
M3 GMC was the first widely used TD by Tank Destroyer Force. It mounted an M1897, the same gun as on the PaK 97/38. This gun was actually slightly weaker than the gun mounted on the Sherman, the main US tank at the time. Eventually the M3 GMC was phased out in favor of the stronger M10.