Which of the following is NOT a classification of patrols?

Surveillance patrols are not typically classified in the same manner as combat, reconnaissance, or zone recon patrols.

Combat patrols are specifically oriented toward engaging with the enemy and often aim to disrupt enemy activities or gather intelligence through direct action. This classification is focused on offensive maneuvers.

Reconnaissance patrols are designed to gather information about the enemy or the terrain, providing critical intelligence that informs decision-making and mission planning. These patrols can be executed to assess an area, note enemy positions, and observe changes in the operational environment.

Zone recon patrols are a subtype of reconnaissance operations with a specific focus on systematically exploring a defined geographical area to collect detailed information.

Surveillance, in contrast, generally refers to ongoing observation of a specific target or area over a period of time, rather than the active, often more aggressive engagements represented by the other patrol types. Thus, surveillance does not fit into the standard classifications commonly used in tactical operations.