defensive air operation in a sentence

1. In times of crises or at war, the air defence and air operations command is responsible for all offensive and defensive air operations.
2. She remained there for 72 days controlling the landing operations on the Hagushi beaches and then providing standby control of offensive and defensive air operations.
3. And the bottom floor office was the management for defensive air operations  to include support for U . S . Army forces and German Civil Defense.
4. It's difficult to find defensive air operation in a sentence.