The Master-at-Arms rating is responsible for law enforcement and force protection in the United States Navy—equivalent to the United States Army Military Police, the United States Marine Corps Militar
Rating insignia
U.S. Navy Master-at-Arms enforcing the installation's speed limit
Naval security force sailors assigned to bicycle patrol duties
U.S. Navy's current law enforcement patch for the NWU
The United States Army Military Police Corps is the uniformed law enforcement branch of the United States Army. Investigations are conducted by Military Police investigators under the Provost Marshal
Master-at-arms (United States Navy)
…The Master-at-Arms (MA) rating is responsible for law enforcement and force protection in the United States Navy—equivalent to the United States Army Military Police, the United States Marine Corps Military Police, the United States Air Force Security Forces, and the United States Coast Guard's Maritime Law Enforcement…
Army Reserve Sgt. Toni Ann Valdner with military police patrol car
The officer in charge is inspecting the arms of the Zouaves, who are about to dispatch on a provost-guard duty.
The man standing on the left side of this picture, which was taken in post-WWII Germany, is a West German policeman (at a time when West Germany's police force was just officially created), while the other, standing on the right side, is a Lithuanian-German member of the US Army Military Police.
Military police from the 115th Military Police Company doing a vehicle search in Fallujah, July 2003