Question

the term blitzkrieg was a military strategy that depended on what?
surprise and quick, overwhelming force
a system of fortifications
the ability to make a long, steady advance
out waiting the opponent

Explanation:

Blitzkrieg is a military strategy that emphasizes surprise attacks and the use of quick, overwhelming force to achieve rapid victories. It does not rely on fortifications (which are more static), long - steady advances (which lack the speed element), or out - waiting opponents (which is a more passive approach).

Answer:

Surprise and quick, overwhelming force