In the 1260s, the Mongol Empire was already cracking, but an unlikely alliance between the Golden Horde of Berke Khan and the Mamluk Sultanate of Baibars sealed its fate. This episode explores how the Jochid khanate, ruled by descendants of Jochi, found common cause with the Mamluks against their cousin Hulegu and the Ilkhanate. We discuss the diplomatic missions, the Battle of Ain Jalut's aftermath, the marriage of Berke's daughter to Baibars, and the flow of horses, slaves, and intelligence across the Black Sea. The alliance not only checked Ilkhanate expansion but also entrenched the division between the Mongol khanates, making reunification impossible. Along the way, we look at the role of the Crimean port of Sudak, the influence of the Mamluk historian Ibn Abd al-Zahir, and how this partnership reshaped the Middle East for centuries.