Constinaprore is quietly being supported by French commercial interests with an interest in the rich oil fields. (In real life France had withdrawn from NATO and was pursuing a more non-aligned course in the 1960s. There are also historical links with Romania, & being French,they were playing their own game). They have taken the opportunity to unload a lot of Indochina War surplus US material, along with a small amount of more up to date French equipment, to the Constinaprorians.
The Bossanovan Republic also has an internal enemy in the form of the Bossa Nova National Resistance (BoNNaR), led by Baden Powell de Aquino.