 Ottoman forces retreated from Trabzon, and on April 15 the city was taken without a fight by the Russian Caucasus Army under command of Grand Duke Nicholas and Nikolai Yudenich.Many adult Turkish males left the city out of fear for reprisals, even though governor Chrysantos included them in his administration.According to some sources the Russians banned Muslim mosques, and forced Turks, who were the largest ethnic group living in the city, to leave Trabzon.