Israel Aircraft Industries manufactured 51 single and ten two-seater Mirage 5s, the IDFAF named them Nesher; after an outstanding performance in the Yom Kippur War, most were sold to Argentina in the late 70s.By the beginning of the decade, the Argentine Air Force was in the process of modernizing its fleet of combat aircraft. While that stage had begun some years earlier with the introduction of the first batch of Douglas A-4P Skyhawk, it began with the incorporation of the BAC Canberra (intended to replace veteran Avro Lincoln and Lancaster killed in 1967) bombers and the signing of the contract for the first supersonic jet FAA: the Mirage III.