Dee ihe na-aga n'ihu maka paragraf a - Alaeze Ukwu Byzantine, enweghị ike ijide obodo ahụ megide ọganihu nke Alaeze Ukwu Ottoman, nyefere ya na 1423 na Republic of Venice. Venice jidere obodo ahụ ruo mgbe Ottoman Sultan Murad nke Abụọ jidere ya mgbe ọ nọchibidoro ya ruo ụbọchị atọ, na 29 Machị 1430. Ndị Ottoman weghaara Tesalonaịka na 1387, mana ha tufuru ya mgbe ha meriri n'agha nke Ankara
megide Tamerlane n'afọ 1402, mgbe a manyere ndị Ottoman na-adịghị ike inyeghachi ndị Byzantine ọtụtụ ókèala.