 The 177th Military Police Brigade was first organized on 14 June 1921 in the Michigan National Guard at Detroit as Headquarters and Headquarters Detachment, 1st Separate Squadron, Cavalry.It was redesignated on 1 July 1921 as Headquarters Detachment, 1st Squadron, 106th Cavalry, an element of the 22nd Cavalry Division.The unit was reorganized and redesignated on 10 April 1929 as Troop I, 106th Cavalry.