 Ramba uchiverenga ndima ino - Kutanga muzana remakore rechi15 Umambo hweOttoman hwakatanga kuwedzera pamusana peUmambo hweByzantium nedzimwe nyika dzaida vatengesi veGenoa. Kurasikirwa zvishoma nezvishoma kwenharaunda yeUmambo, pamwe chete nokuparadzwa kwenyika duku dzechiKristu dzakadai seTrebizond, Cyprus, neAmasra zvakaderedza fariro dzevatengesi veGenoa muGungwa Dema. VaOttoman vakavaka ngarava huru, uye nokuita kudaro vakava simba guru rengarava muEastern Mediterranean. Muna 1453 Constantinople yakawa, uye vaOttoman vakavhara Dardanelles neHellespont kuti ngarava dzechiKristu dzisapfuure. Chiito ichi chakagura uto rehondo reGenoa kubva pazvivako zvaro muGungwa Dema, uye Genoa yakazviwana iri yoga kubva kumakoroni ayo kwemazana emakore akanga apa nyika yacho mukana wokuenda kuRussia neCentral Asia. Vasina nzira yokudzokera nayo kumusha uye vakakanganiswa nzira dzavo dzokukurukurirana, boka revarwi veGenoa raiva muGungwa Dema rakapararira. Zvavakanga vasisakwanisi kuzvidzivirira, matura, nhare, uye ngarava dzakavakwa neRepublic dzakarasika. Zvitsuwa zvekare zveGenoese zvakazopedzisira zvabatanidzwa nemasimba enharaunda, neKaffa ichiwira kumaOttomans muna 1475. 