Final answer:
Motorized infantry units were used during the invasion of the Polish Corridor as part of the Blitzkrieg strategy.
Step-by-step explanation:
The type of motorized troops used during the invasion of the Polish Corridor was motorized infantry units. The German army employed tanks, planes, and motorized infantry to concentrate their forces and achieve swift victories. This strategy, known as Blitzkrieg or "lightning war," involved quick air strikes followed by a land invasion with fast-moving armor and heavy artillery.