Rubuta ci gaba don wannan sakin layi - A cikin 1954 Oliva an ba shi izini a matsayin na biyu a cikin Sojojin Cuba bayan kammala karatunsa daga Kwalejin Sojojin Cuba, "Makarantar Cadet". Bayan kammala karatunsa tare da girmamawa daga Kwalejin Artillery a 1955 an nada shi farfesa na Artillery a Makarantar Cadet har zuwa 1958. Daga 1958 zuwa 1959 ya kasance dalibi, kuma ya kammala karatu tare da girmamawa, kuma mai koyarwa a Makarantar Caribbean ta Amurka a Canal Zone, Panama
Ka yi haƙuri. A ƙarshen 1959 bayan juyin juya halin Castro ya hambarar da Janar Batista, an "tsabtace" sojojin Cuba, amma an nada Oliva Babban Sufeto a INRA. A watan Mayu 1960 yana daya daga cikin rukunin tsoffin jami'an Cuba da ke shirin kamfen kan gwamnatin Castro. Dukkansu sun sauke karatu ne daga makarantar soja ta Cuba. Ya bar sojojin a farkon watan Agustan 1960 kuma ya tashi zuwa Miami. A ranar 29 ga Agusta, 1960, Oliva da wasu matasa 'yan gudun hijirar Cuba 40, wadanda Hukumar Leken Asiri ta Tsakiya ta dauka, an dauke su ta jirgin saman CIA C-54 zuwa San José, Guatemala don gudanar da horon' yan tawaye wanda daga baya ya zama na al'ada.