Dassault/Dornier Alpha Jet (France/Germany) ✈ FMA IA 63 PAMPA(ARGENTINA) ✈ PZL I-22 Iryda (Poland) ✈ KAwasaki t-4 (JAPAN)

Dassault/Dornier Alpha Jet (FRANCE/GERMANY). First flight: 26 October 1973 (WIKI)

FMA IA 63 Pampa(Argentina). First flight: 6 October 1984 (WIKI)

Although influenced by the Dassault/Dornier Alpha Jet design, the Pampa differs in being a smaller aircraft, it is also single-engined and has straight supercritical wings rather than the swept ones of the Alpha Jet
— Wikipedia

PZL I-22 IRYDA (POLAND). First flight: 3 March 1985 (WIKI)

KAWASAKI T-4 (JAPAN).  First flight July 29, 1985 (WIKI)