It's not uncommon for civilians to see an armored fighting vehicle (AFV) with caterpillar tread and a large cannon and call it a tank. Those are the basic features that make up a main battle tank, ...
Key point: Tank-destroyers also taught the Army not to over-specialize. There was no need for multiple classes of tanks that were strong in one respect and weak in another. During the 1940s, the U.S.