655 Squadron traces its lineage to No. 655 Squadron RAF formed on 30 November 1942 at Old Sarum Airfield, Wiltshire. The squadron's role was to provide targeting and direction information to the artillery on the ground. A large number of the pilots were Army gunnery officers from the 80th Medium Regiment, Royal Artillery. On 12 August 1943, the squadron deployed in support of the 8th Army to North Africa and subsequently moved to Italy, where it remained supporting various formations until its disbandment on 31 August 1945. 'A' Flight had served in the Battle of Anzio. 655 Light Aircraft Squadron was formed in April 1962 at Tofrek Barracks in Germany operating the Sud Aviation Alouette II helicopter. In April 1964, the squadron moved to Hammersmith Barracks at Herford and was renamed 655 Aviation Squadron. The squadron was employed by 4 Division Aviation Headquarters from 1964 to 1969. In 1971, the squadron was renamed as 655 Aviation Squadron in recognition of its historical linkage to The Scottish Horse. On 1 January 1973, the squadron was renamed as 655 Squadron. The squadron completed four tours in Northern Ireland between 1973 and 1979. In 1978, 666 Squadron AAC had been re-designated as 655 Squadron based at Topcliffe, Yorkshire. In 1979, the squadron moved to Omagh in Northern Ireland as part of the Northern Ireland Regiment, where it carried out anti-terrorist duties in support of 3 Brigade. The squadron operated the Westland Gazelle AH1 and Westland Scout AH1 helicopter. In the summer of 1982, the squadron moved to Shackleton Barracks, County Londonderry. The Scout was replaced by the Lynx AH Mk1 helicopter which was faster and had greater endurance. In the summer of 1991, the squadron moved to RAF Aldergrove to collocate with the rest of the Northern Ireland Regiment. The squadron became equipped with the Lynx AH7 which had improved avionics, reduced noise, better hover capability and more advanced composite rotor blades. The Northern Ireland Regiment was renamed as 5 Regiment AAC in 1993. In March 2007, the squadron was disbanded as Operation Banner was drawing to a close and due to a need to reduce the Lynx fleet set to be retired in 2012. On 1 April 2009, the squadron was reformed as a Territorial Army unit 655 Squadron as part of 6 RegimentArmy Air Corps based at the Army Aviation Centre, Middle Wallop. The squadron's role was to provide groundcrew individual reinforcements to army aviation units for exercises and operational deployment.
On 1 April 2014, 679 Squadron was formed following the re-designation of 655 Squadron and the transfer of a re-roled D Company, 3 PWRR to the squadron as part of the Future Reserves 2020 re-organisation of the Army Reserves. The squadron traces its lineage to No. 679 Squadron RAF formed on 1 December 1943 at RAF Ipswich. The squadron operated the Miles Martinet, Hawker Hurricane, Fairey Barracuda and Vultee A-31 Vengeance aircraft types for anti-aircraft duties based at East Anglia. 679 Squadron RAF disbanded on 26 June 1945. The squadron is a sub-unit of 6 Regiment AAC and consists of Squadron Headquarters and A Flight based at Duke of Connaught's Barracks in Portsmouth and B Flight based at the Army Aviation Centre. The squadron is paired with the Army Aviation Centre where it provides ground support to the Apache. The squadron is trained in the loading of missiles, rockets, ammunition and the refuelling of the aircraft from a Forward Arming and Refuelling Point.