Tanks were usually involved in any invasion in the European theatre during World War II. The German Panzer Is and IIs spearheaded the invasion of Poland, while the later Panzer IIIs and IVs were used ...

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.