 Complete the following phrase:  The Mongols made their first appearance in the Georgian possessions when this latter kingdom was still in its zenith, dominating most of the Caucasus. First contact occurred early in the fall of 1220, when approximately 20,000 Mongols led by Subutai and Jebe pursued the ousted Shah Muhammad II of the Khwarazmian dynasty to the Caspian Sea. With the consent of Genghis Khan, the two Mongol generals proceeded west on a reconnaissance mission. They thrust into Armenia, then under Georgian authority, and defeated some 10,000 Georgians and Armenians commanded by King George IV Lasha of Georgia and his atabeg tutor and amirspasalar commander-in-chief Ivane Mkhargrdzeli at the Battle of Khu on the Kotman River. George was severely wounded in the chest. The Mongol commanders, however, were unable to advance further into the Caucasus at that time due to the demands of the war against the Khwarezmian Empire, and turned back south to Hamadan. Once Khwarezmian resistance was all but mopped up, the Mongols returned in force in January 1221. Though King George was initially reluctant to give battle after his previous defeat, Jebe and Subutai forced him to take action by ravaging the countryside and killing his people. The ensuing battle at Bardav Pardav; modern-day Barda, Azerbaijan was another decisive Mongol victory, obliterating Georgias field army. Though Georgia lay bare, the Mongols had come as a small reconnaissance and plundering expedition, not an army of conquest. Thus the Mongols marched to the north, plundering northeastern Armenia and Shirvan en route. This took them through the Caucasus into Alania and the South Russian steppes where the Mongols routed the Rus-Kipchak armies at the 