Too Small, Too Big, and Too Late

Two American tanks - the M22 Locust airborne tank on the left and the T-95 (T28) super heavy tank on the right. The M22 was too small to really do much (even to support infantry later in the war) and the T-95 was too big and slow to do much either (it was designed to blast through huge German defenses along the Siegfried Line and West Wall).

The German A7V (of which the chassis was found in Poland, sunk in a river). It came too late in the war to really make much of an impact, and it wasn't a very good tank anyway (one small 75mm gun and several machine guns).