By what was XXX replaced?
Sud Aviation
Sud Aviation (French pronunciation: ​(syd avjasjɔ̃), Southern Aviation) was a French state-owned aircraft manufacturer, originating from the merger of Sud-Est (SNCASE, or Société nationale des constructions aéronautiques du sud-est) and Sud-Ouest (SNCASO or Société nationale des constructions aéronautiques du sud-ouest) on 1 March 1957.