 Additionally, Mussolini ordered a voluntary army, the "Corpo Truppe Volontarie" (CTV) of some 12,000 Italians of fully motorised units to Seville and Hitler added to them a professional squadron from the Luftwaffe (2JG/88) with about 24 planes.All these planes had the Nationalist Spanish insignia painted on them, but were flown by Italian and German nationals.The backbone of Franco's aviation in those days were the Italian SM.79 and SM.81 bombers, the biplane Fiat CR.32 fighter and the German Junkers Ju 52 cargo-bomber and the Heinkel He 51 biplane fighter.