Question

When the United States’ use of military force is successful in maintaining national security, the United States is able to

Answer 1

When the United States’ use of military force is successful in maintaining national security, the United States is able to remove themselves from the occupied countries, as the military power is hugely used to defend the territory. It can prevent and even end invasion, conquest, and subjugation.

Answer 2

When the united states' use of military force is successful in maintaining national security, the United States is able to focus on improving the occupied countries,

The military did this in order to prevent the future threat from happening. So after they're successful in maintaining national security, they will try to fix the root of the problems while still maintaining the peace pact.