What strategy was known for use of combined air and land forces in a blitzkrieg?

The strategy known for using combined air and land forces in a blitzkrieg is combined arms warfare. Blitzkrieg, which translates to "lightning war," was a military tactic used primarily by Germany during World War II. It emphasized speed and surprise, integrating fast-moving and coordinated attacks by mobile ground forces (such as tanks) with close air support.

This approach allowed for rapid breakthroughs and encirclements of enemy forces, making traditional defenses ineffective. The distinct feature of combined arms warfare is how different military branches and units work together seamlessly to achieve tactical goals, which was central to the success of blitzkrieg operations.

In contrast, other options like invasion tactics refer to broader strategies without the specific focus on the integration of air and land forces. Amphibious operations involve landing forces on a beach from the sea, which, while a critical military strategy, does not encapsulate the principles of blitzkrieg. Strategic bombing, on the other hand, focuses primarily on destroying an enemy's industrial and civilian infrastructure from the air, rather than the rapid ground assaults that characterize combined arms warfare in blitzkrieg tactics.