The chad M2A2 Bradley vs the virgin T-90M.

Supposedly they new this can happen back in USSR. Probably a forgotten knowledge by now though.

>When the USSR faced the question of the lack of effectiveness of the BMP-1's main armament, two prototypes were tested at the Alabinsk training ground. One was armed with an improved 73-mm Zarnitsa cannon, and the other with a 30-mm automatic cannon. Comparative tests consisted of firing at a tank at a distance of 1 km

>The tank was placed on its side and the turret was turned to face the BMP. The tank was fully fueled, but without ammunition.

>The first to fire was the BMP with the Zarnitsa. Out of three shots (7.5% c/e), it managed to pierce the T-72's hull once under the upper track branch. But... the tank's driver sat back in his seat, and the vehicle moved away from the line on its own. Next, an infantry fighting vehicle with a 30-mm cannon fired. The result of three rounds of 8 shells each (4.8% of the damage): the tank caught fire after hitting the external fuel tank and could only be extinguished by a fire truck; the starboard side was demolished to the armor hull; the turret machine gun fell to the ground behind the tank; the radio antenna was carried 15 meters away; the turret's shoulder straps were jammed; one shell hit the combat compartment through the gun mask and broke the vertical guidance cylinder. The tank completely lost its combat capability