 Ramba uchinyora ndima iyi - Vachitarisana nengozi yeOttoman, vakatsiva vaMichael, zvikurukuru John V naManuel II, nguva nenguva vakaedza kudzorera Union, kuchivhiringidza zvikuru vanhu vavo. Pamusangano weFlorence muna 1439, Mambo John VIII akasimbisazve mubatanidzwa wacho nemhaka yokurwiswa kwakanga kwava pedyo kweTurkey pazvishoma zvakanga zvasara zvoumambo hwake. Nokuda kwavagari vemo veByzantium vamene, Kubatana kweChechi, uko kwakanga kwavimbisa chipikirwa chehondo huru yokumadokero yokurwisa vaOttoman, kwakanga kuri kutongerwa rufu nokuda kwoumambo hwavo. John VIII akanga atengesa kutenda kwavo uye naizvozvo pfungwa yavo yose youmambo nokuona kwavo nyika. Hondo yechitendero yakapikirwa, chibereko chebasa raJohn VIII, yakaguma nenjodzi bedzi sezvo yakakundwa navaTurkey paHondo yeVarnamuna 1444. 