Against the Alans and the Cumans (Kipchaks), the Mongols used divide-and-conquer tactics by first telling the Cumans to stop allying with the Alans and, after the Cumans followed their suggestion, the Mongols then attacked the Cumans after defeating the Alans. Alans were recruited into the Mongol forces with one unit called "Right Alan Guard" which was combined with "recently surrendered" soldiers, Mongols, and Chinese soldiers stationed in the area of the former Kingdom of Qocho and in Besh Balikh the Mongols established a Chinese military colony led by Chinese general Qi Kongzhi (Ch'i Kung-chih). Alan and Kipchak guards were used by Kublai Khan. In 1368 at the end of the Yuan dynasty in China Toghan Temür was accompanied by his faithful Alan guards. Mangu enlisted in his bodyguard half the troops of the Alan prince, Arslan, whose younger son Nicholas took a part in the expedition of the Mongols against Karajang (Yunnan). This Alan imperial guard was still in existence in 1272, 1286 and 1309, and it was divided into two corps with headquarters in the Ling pei province (Karakorúm). In 1254 Rubruquis found a Russian deacon amongst the other Christians at Karakorum. The reason why the earlier Persian word tersa was gradually abandoned by the Mongols in favour of the Syro-Greek word arkon, when speaking of Christians, manifestly is that no specifically Greek Church was ever heard of in China until the Russians had been conquered; besides, there were large bodies of Russian and Alan guards at Peking throughout the last half of the thirteenth and first half of the fourteenth century, and the Catholics there would not be likely to encourage the use of a Persian word which was most probably applicable in the first instance to the Nestorians they found so degenerated. The Alan guards converted to Catholicism as reported by Odorico. They were a "Russian guard".