143 Military Police Battalion CAANG (U.S. Army) The 143 Military Police Battalion is a unit within the U.S. Army’s Criminal Investigation Command and Army Air & Missile Defense Command, collectively known as the Combined Arms-Army National Guard (CAANG). Its primary role involves maintaining law and order, conducting investigations, and ensuring security both domestically and abroad. The battalion is part of the larger Military Police Corps, which operates under the U.S. Department of Defense. The 143 MP Battalion’s specific duties can vary depending on its deployment, ranging from crowd control and detainee operations to criminal investigation and military law enforcement. It contributes significantly to maintaining security and upholding the rule of law within the U.S. Army and beyond.