The Sri Lanka Air Force (SLAF) is the air arm and the youngest of the Sri Lanka Armed Forces. It was founded in 1951 as the Royal Ceylon Air Force (RCyAF) with the assistance of the Royal Air Force (RAF). The SLAF played a major role throughout the Sri Lankan Civil War. The SLAF operates more than 160 aircraft and has a projected trained strength of 27,400 airmen and 1,300 officers, who are from both regular and reserve service. The Sri Lanka Air Force has expanded to specialise mainly in providing air-support to ground forces, troop landing, and carrying out airstrikes on rebel-held areas in the Northern and Eastern theatres, but is also capable of high- and low-level air defence.