Heya,
I just read this on the M-18 Hellcat tanks destroyer.
Used by tank destroyer battalions in Europe. It was intended to be used in an ambush roll with its quick speed.
It first saw action in the Summer of 1944 in Europe. One unit to use it quite effectively was the 630th Tank Destroyer Battalion in July 1944 reported destroying 53 Panthers & Tigers and 15 self propelled guns with only a loss of 17 of their M18s.
Could penetrate 101 mm. Muzzle velocity 2,600 ft/sec.
It was a 76MM cannon.
How does this rate with the German 75mm and 88mm. As well as the Russian T-34??