This United States Army manual, Army Techniques Publication ATP 3-39.10 Police Operations August 2021, provides guidance for commanders and staffs on police operations. This manual addresses police operations across the range of military operations. Police operations support decisive action tasks (offensive, defensive, and stability or defense support of civil authorities [DSCA]). This manual emphasizes policing capabilities necessary to establish order and subsequent law enforcement activities that enable successful establishment, maintenance, or restoration of the rule of law. While this manual focuses on the police operations discipline and its associated tasks and principles, it also emphasizes the foundational role that police operations, in general, play in the military police approach to missions and support to commanders.

The principal audience for this manual is leaders and Army professionals at all echelons who are tasked with planning, directing, and executing police operations. Trainers and educators throughout the Army will also use this manual.