Which term refers to the movement of forces through or into territory occupied by the enemy?

The term that refers to the movement of forces through or into territory occupied by the enemy is infiltration. This tactic is often employed in military operations to gain a tactical advantage by moving personnel or units discreetly and directly through enemy lines. Infiltration can be executed to gather intelligence, conduct surprise attacks, or set the stage for larger offensive operations, thereby undermining the enemy’s defensive posture without direct confrontation.

In contrast, a feint is a deceptive maneuver designed to mislead the enemy regarding the actual point of attack. A counteroffensive involves launching an attack after successfully defending against an enemy offensive, focusing on regaining territory and momentum. Interdiction refers to actions taken to obstruct or delay enemy forces and supplies before they can reach the front lines. Each of these alternatives serves distinct strategic purposes, but they do not specifically denote the direct and covert movement of forces into enemy territory as infiltration does.