In which maneuver does an attacking force conduct undetected movement through enemy territory?

An infiltrating maneuver is specifically designed for an attacking force to move covertly through enemy territory without detection. This approach allows the force to position itself advantageously while minimizing the risk of confrontation and maintaining the element of surprise. Infiltration can be crucial for achieving strategic objectives such as gathering intelligence or launching an attack on enemy vulnerabilities.

In contrast, other options do not align with the concept of undetected movement. Penetration, for instance, involves breaching enemy defenses but typically does so with some level of engagement or confrontation. Cover routing refers to the use of terrain or other means to disguise movements, but it does not specifically encompass the undetected aspect of movement within enemy territory. A frontal assault involves a direct and aggressive approach against enemy positions, making stealth counterproductive in that context. Thus, infiltration is the most appropriate term for the described maneuver.