After the formation of the Queen's Own Highlanders in February 1961, the part–time Territorial Army units of the pre-amalgamation regiments continued unchanged, with the 11th battalion, Seaforth Highlanders (TA) and the 4/5 battalion Cameron Highlanders (TA). In April 1967 both were disbanded on the formation of the 3rd (Territorial) battalion, Queen's Own Highlanders, which was itself disbanded in March 1969. From then on, the part–time element of all Highland regiments were included within the 51st Highland Volunteers.
