Patrolling is a military tactic. Small groups or individual units are deployed from a larger formation to achieve a specific objective and then return. The tactic of patrolling may be applied to ground troops, armored units, naval units, and combat aircraft. The duration of a patrol will vary from a few hours to several weeks depending on the nature of the objective and the type of units involved.

There are several different types of patrol each with a different objective. The most common is to collect information by carrying out a reconnaissance patrol. Such a patrol may try to remain clandestine and observe an enemy without themselves being detected. Other reconnaissance patrols are overt, especially those that interact with the civilian population.