The 503rd Infantry Regiment and the 2nd Infantry Division are both formations of what military branch
2nd Infantry Division (United States) The 2nd Infantry Division ("Indianhead"; "2ID," "2nd ID", or "Second D") is a formation of the United States Army. Its current primary mission is the defense of South Korea in the initial stages of an invasion from North Korea until other American units can arrive. There are approximately 17,000 soldiers in the 2nd Infantry Division, with 10,000 of them stationed in South Korea, accounting for about 35% of the United States Forces Korea personnel.
2 Military Police Regiment (Canada) 2 Military Police Regiment (2 MP Regt) is a unit of the Canadian Forces. It provides support to the Canadian Army within the Province of Ontario. It does not provide support to Canadian Forces Bases Borden, Trenton and North Bay and Canadian Forces Support Unit (Ottawa). The unit was initially created in the summer of 2006. Since then, the unit was officially established with the creation of a Ministerial Organization Order (MOO) and a Canadian Forces Organization Order (CFOO) dated September 24, 2007. It is a "total force" unit of the Land Force Military Police Group (LF MP Gp). The term "total force" describes a unit which includes both Regular Force and Reserve Force members. 2 MP Regt is responsible for police, security and detention operations as well as police support in field operations. The unit headquarters is located at The George Taylor Denison III Armoury, more commonly known as Denison Armoury, in Toronto, Ontario. The strength of 2 MP Regt totals just under 300 personnel. Since the Transfer of Command Authority (TOCA) on 1 April 2011, 2 MP Regt is under the full command of the Canadian Forces Military Police Group CF MP Gp through the CA MP Gp, and attached Operational Command (OPCOM) to the 4th Canadian Division (4 Cdn Div). The unit is commanded by a Major as the Commanding Officer (CO) and the unit has a Master Warrant Officer who is the Regimental Sergeant Major (RSM). The CO of 2 MP Regt reports directly to the Commander of the Land Force Military Police Group, as well as the Commander of 4 Cdn Div. The CO has a dual function as Commanding Officer and Division Provost Marshal.