Final answer:
A blitzkrieg is a rapid invasion by air and land, characterized by overwhelming force and speed. It was first used by German forces in World War II.
Step-by-step explanation:
A blitzkrieg is defined as a rapid invasion by air and land. It is a military tactic that was first used by German forces in World War II. A key characteristic of a blitzkrieg is the combination of overwhelming force and speed, which aims to quickly break through enemy defenses and create chaos. This strategy often involved coordinated attacks by aircraft, tanks, and infantry troops.
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