Organized and Federally recognized 19 December 1946 in the California National Guard at Placerville as Company C, 184th Infantry, an element of the 49th Infantry Division
Reorganized and redesignated 1 May 1959 as the 1st Rifle Platoon, Company C, 3d Battle Group, 184th Infantry
Reorganized and redesignated 1 March 1960 as the Reconnaissance Platoon, Support Company, 1st Battle Group, 184th Infantry
Reorganized and redesignated 1 March 1963 as the Reconnaissance Platoon, Headquarters and Headquarters Company, 1st Battalion, 184th Infantry
Reorganized and redesignated 1 April 1964 as the Battalion Reconnaissance Platoon, Headquarters and Headquarters Company, 1st Battalion, 184th Infantry
Converted and redesignated 4 December 1965 as the Battalion Reconnaissance Platoon, 3d Battalion, 149th Armor, an element of the 49th Infantry Division
Reorganized and redesignated 1 December 1966 as the Battalion Scout Platoon, Headquarters and Headquarters Company, 3d Battalion, 149th Armor
Converted and redesignated 29 January 1968 as the 1st and 2d Squads, 1st Platoon, 270th Military Police Company, and relieved from assignment to the 49th Infantry Division
Consolidated 1 April 1970 with the 270th Military Police Company (see ANNEX), and consolidated unit designated as the 270th Military Police Company; concurrently, location changed to Sacramento
Ordered into active Federal service 6 December 1990 at Sacramento; released from active Federal service 10 June 1991 and reverted to state control
Ordered into active Federal service 2 May 1992 at Sacramento; released from active Federal service 9 May 1992 and reverted to state control
Ordered into active Federal service 1 October 2001 at Sacramento; released from active Federal service 30 September 2002
Ordered into active Federal service 15 March 2003 at Sacramento; released from active Federal service 14 March 2004 and reverted to state control
Ordered into active Federal service 16 January 2015
Annex
Organized and Federally recognized 22 January 1951 in the California Army National Guard at Sacramento as Headquarters and Headquarters Company, 2d Battalion, 111th Armored Cavalry
Converted and redesignated 1 June 1954 as Headquarters and Headquarters Battery, 170st Antiaircraft Artillery Battalion
Consolidated 1 May 1959 with the Medical Detachment, 170th Antiaircraft Artillery Battalion (organized and Federally recognized 24 January 1955 at Sacramento), and consolidated unit designated as Headquarters and Headquarters Troop, 2d Reconnaissance Squadron, 149th Armor, an element of the 49th Infantry Division
Reorganized and redesignated 1 March 1963 as Headquarters and Headquarters Troop, 1st Squadron, 170th Cavalry, an element of the 49th Infantry Division
Converted and redesignated 29 January 1968 as the 270th Military Police Company and relieved from assignment to the 49th Infantry Division
Home Station: Sacramento (less detachment at Placerville)