Which aspect is NOT a part of the key elements of a patrol base?

A patrol base is a location used for the temporary halting of a unit, which allows for rest, security, planning, and preparation for future operations. The key elements of a patrol base include aspects that ensure its effectiveness in providing safety and operational readiness.

Security is crucial; it involves creating measures to detect and deter enemy forces. This can include setting up observation points and establishing security personnel to maintain watch around the perimeter.

Sustainability refers to the ability to support operations from the patrol base. This includes access to resources like water and food, as well as the capacity for maintaining communication and medical support.

Concealment ensures that the patrol base remains hidden from the enemy, using natural terrain, vegetation, or constructed features to avoid detection.

Reinforcement, while an important tactical consideration in broader military operations, is not a core element of a patrol base itself. The focus of a patrol base is more on immediate operational effectiveness rather than planning for the reinforcement of forces. Thus, this indicates that reinforcement doesn't fit within the foundational elements that define a patrol base's characteristics and functions.