There was talk of taking diplomatic advantage of the unexpected victory, but Devlet decided on a knock-out blow. By 5 August he had 120 thousand men on the Oka – 80 thousand Crimeans and Nogais, 33 thousand Turks and 7000 janissaries. A Nogai detachment crossed the river and the rest of the army followed. Ivan fled towards Novgorod. The troops on the Oka went after Devlet, blocking his retreat. Devlet told his men to ignore them and concentrate on catching Ivan. His sons Mehmed and Adil disobeyed, attacked the Russians and were defeated. Devlet sent 10000 Nogai against the Russians but they fell under artillery fire. Devlet broke off the pursuit and turned his large army to block the advancing Russians. The Russians broke into groups and surrounded each group with gulyay-gorods. The first battle was about even, but the Russians captured Deve-Bey, the leader of the Nogais. Baki-Bey? Devlet planned to surround the gulay-gorods and starve them out, but the leaderless Nogais demanded immediate action. Devlet had to agree. The decisive battle took place on 11 August. When the cavalry attacked the gulay-gorods their walls were dropped revealing artillery and musketeers. The Tatars fell back and were caught by a Russian troop that had slipped behind them. The losses were worse than the previous day and Devlet lost a son and grandson. While this was going on the Tatars captured a message from Ivan saying that he was arriving with a large force. The message was a trick, Devlet fell for it and retreated, having lost a large part of his army. Estimates of the survivors range from 5 to 20 thousand. See Battle of Molodi.