 Ramba uchinyora ndima iyi - Pashure pokuwa kweConstantinople muna 1453, Umambo hweOttoman, pasi paSultan Mehmed II, hwakatyisidzira chiKristu cheEurope. Gore rakatevera iroro Pope Callixtus III akatuma John, uyo akanga atova namakore makumi manomwe okukura, kundoparidzira Hondo yeChipiyaniso mukurwisana navaTurkey vaipinda muImperial Diet yeFrankfurt. Asingawani mhinduro shoma muBavaria neAustria, akasarudza kuisa ngwariro dzake muHungary. John akabudirira kuunganidza mauto akakwana kuti aende kuBelgrade, iyo panguva iyoyo yakanga yakombwa nemauto eTurkey. Muzhizha ra1456, mauto aya, pamwe chete naJohn Hunyadi, akakwanisa kubvisa kukombwa kweBelgrade; mumongi akwegura uye asina kusimba chaizvoizvo akatungamirira boka rake amene muhondo. Ichi chiito chakamupa zita remadunhurirwa rokuti Mupristi Murwi. 