11.   Three of the soldiers strayed into enemy territory.

12.   We crossed the river into enemy territory.

13.   We pushed deep into enemy territory.

14.   The army has made another big push into enemy territory.

15.   The attack failed to lead to any deep penetration of enemy territory.

16.   New troops parachuted into enemy territory.

17.   The army is finally making inroads into enemy territory.

18.   The soldiers are operating deep within enemy territory.

19.   New troops were parachuted into enemy territory.

20.   He was shot down in a dogfight over enemy territory.