Jalal ad-Din Mingburnu
The third and final invasion of the Caucasus by the Mongols took place in 1236. This offensive, which would prove the ruin of Georgia, was preceded by the devastating conflict with Jalal ad-Din Mingburnu, a refugee shah of Khwarezmia, who had demanded in 1225, that the Georgian government support his war against the Mongols. The ensuing Khwarezmian attack, Tbilisi was captured in 1226, and much of the former strength and prosperity of the Kingdom of Georgia was destroyed, leaving the country largely defenseless in the face of the forthcoming Mongol conquests.