an Entity references as follows:
The Fire of Moscow occurred on May 24, 1571, when the Crimean and Turkish army (8,000 Crimean Tatars, 33,000 irregular Turks and 7,000 janissaries) led by the khan of Crimea Devlet I Giray, bypassed the Serpukhov defensive fortifications on the Oka River, crossed the Ugra River, and rounded the flank of the 60,000-man Russian army.