 These units may deploy to foreign theaters of operations with the brigade when it is called upon, and they also can deploy to various installations throughout the United States when needed for participation in training and readiness exercises.The unit was first constituted on 3 April 1959 in the Army Reserve as Headquarters and Headquarters Detachment, 220th Military Police Group before being activated on 25 May of that year in Washington, D. C.. On 23 July 1960, the location of the group's headquarters was changed to Rockville, Maryland.The group remained in the reserves throughout the Vietnam War, and was never called upon to serve in the Vietnam theater of operations, as active duty military police groups were already being organized in the theater and additional, reserve commands were not needed.