This publication, Field Manual FM 3-39 Military Police Operations April 2019, describes the operational doctrine of the Military Police Corps Regiment. This manual is aligned with joint and Army doctrine. Other military police doctrinal publications are based on the foundations established in this manual and are synchronized with their respective joint and Army publications. The principal audience for FM 3-39 is the commanders and staff elements at all echelons and the military police personnel who are tasked with planning, directing, and executing military police missions. Training developers and educators throughout the Army use this manual.FM 3-39 applies to the Active Army, Army National of the United States and United States Army Reserve unless otherwise stated.Future operations will occur in complex, chaotic, violent, and uncertain operational environments against peer and near peer threats.