Oikouménē
Shortly after the Roman civil war and the Ottoman invasions of Bălgarskо and Rhōmaíōn, various nobles throughout the once-powerful Empire of the Romans pledged to defend their faith and lands.
Цар Лазар Tsar Lazar has pledged his army and his life to defend God, church the sacred lands of the Serbs and to fight on behalf
Χ, en Christō tō Theō pistós basileus kai autokratōr Rhōmaíōn for renumeration of course
Even the peasantry was moved by the Theotokos to defend their land from the encroaching Turks
(Sorry for Amateur hour )