From 1970, nearly every army brigade had at least one Aviation Squadron that usually numbered twelve aircraft. The main rotor aircraft during the 1970s were the Westland Scout and Bell Sioux general purpose helicopters. The Sioux was replaced from 1973 by the Westland Gazelle used for Airborne reconnaissance; initially unarmed, they were converted to carry 68mm SNEB rocket pods in 1982, during the Falklands War. The Scout was replaced from 1978 by the Westland Lynx, which was capable of carrying additional firepower in the form of door gunners.