the don army (28,000 strong) under the command of imperial commander peter lacy besieged the fortress in 1736. forces of russia opened continuous artillery fire on the fortress on 11 june. lacy gave an order to begin the storming in the night of 28/29 june. during the battle the russian army encountered unexpected resistance. the total russian losses in the battle for the azov fortress were 7 killed and 38 wounded. after the night attack azov pasha mustafa agi was invited to surrender the fortress to the russians. per the terms of the treaty of belgrade the city became part of the russian empire.