As for the Alans (also called Jases, Jasins), originaly from Caucasus, all of them were in military service. The most famous of them is the family of Atachi, whose father Kanguz (Khankus) was the leader of one of several Jasin state formations.
During the Mongol invasion, Kanguz and his citizens did not resist Ugedei-Khan, so he remained a ruler of his lands and also given was given a golden sign of honor (Golden Paitza) and title of 'badur'. At Mongol's order he formed an army of 1,000 men strong and put his son Atachi as its commander.
Atachi under Moengke-Khan, participated in the campaign against Soun, fought Chinese armies in Sichuan province and Tiao-uy mountains. For his bravery he was awarded the badge of honor (Tiger Paitza), got silver and the title of 'commander of 1,000'.
Under Kublai(Khubilai)-Khan, he fought against the Chingizids, that opposed the Yuan dynasty. Atachi fought against Arigbuka, then supressed rebellion in China, in 1267 again campaigned agains Soun, under Mongolian warlords Bayan and Asha. During his military career, Atachi participated in more than 20 major battles in China and Central Asia.
Atachi was succeeded by his son Baidar. He too commanded thousand wariors and battled Chingisids in Eastern Turkestan, Dzhetysou, and Mongolia, reaching the Altai mountains. In 1285 he stood out during the supression of rebellion at Besh-Balyk against Kublai-Khan.
For his ahievements Baidar was granted a honorary title of 'as-badur-darugatchi'.
Baidar died in 1300, his positions were passed to his sons Oros and Fudin. Baidar was at the origins of creation of Imperial Guard regiments, formed from Jases. The first regimens were formed in 1272 and included 3,000 Jases. Also, 700 more Jases were bodyguards of Kublai-Khan during his trips, and keepers in emperor's city and palaces.
'YUAN-SHI' has the biographies of Jases: George (Kouertzi), Shari (Cheli). Shilabadur, Badur, Youvashi, Fude (Peter), and Arslan that were honored on Mongolian military service.
George (Kouertzi) began his carrier under the mentorship of Fude's father during the reign of Moengke-Khan in the Imperial Guard, and later commanded Jasin regiment 2,000 men strong.
During Kublai-Khan reign, George with 100 warriors (under leadership of warlord Ashu) participated in campaign against Soun. After victory in Soun, George commanded army of Jases battling the army of warlord Haidu. For military achievements he was promoted by rulers: Kublai-Khan, Timour-Khan, Haisan-Khan.
During Khaisan-Khan reign, George held a position of 'chzhalkhuachi', he commanded the Right Wing of Jasin Guard.
Demidir (Dmitri) was George's son. Demidir also served in the Jasin Guard, where he led a hundred men. Became famous during the supression of uprising of Mongolian regional ruler Nayan. After George's death Demidir was a successor of his title as a commander of Jasin Guard. Demidir's son Sianshan also served in Jasin Guard during the reign of Haisan and Ayurbarvad.
George and Demidir (Dmitri), judging by their names, were Christians.
Shari was descended from Jasin family that submitted to the Mongols and joned their army. His father Bekkibai (Betzeba) under Moengke-Khan fought in China, in Tiao-uy mountains and was decorated for his military deals. Under Kublai-Khan he fought against Haidu army. He became famous after the battle near Baikal Lake where he beheaded Haidu, the enemy of Kublai-Khan and captured huge amounts of cattle.
After the creation of the Jasin Guard, Shari commanded the Left Wing of the Jasin Guard, was decorated by Golden and Tiger badges and plenty of gifts. Shari's positions were passed to his son Shilemyn.
Shilabadur's family also collaborated with Mongols. His father Yruktama started his carrier from low post of 'header of ten' in the times of Moengke-Khan. In Kublai-Khan's time Shilabadur participated in wars against Soun, being included in army of warlord Bayan. His direct commander was Atachi. Shilabadur served under Atachi's command, and for his bravery during the supression of local uprisings of Mongol regional rulers: Nayan, Hadaan, Toto and others. the Imperor granted him the title of 'badur' and put his in head of 1,000 Jasin Guard warriors.
Shilabadur's sun Nogaichin (Nakhaichan) succeeded his father, and later commanded the Left Wing of the Jasin Guard. 'YUAN-SHI' lists in details many of his pompous titles and decorations. Nogaichin died in 1325.
Other notable leaders of Mongolian Army were Jases: brothers Badur, Utzoer-Bukhan (Anzorbuka), and Matarsha. They enlisted to Mongolian military service yet during Moengke-Khan's reign.
Matarsha was in the vanguard of Moengke-Khan's army during the war against Soun, and was killed in battle. Badur actively participated in more than 20 battles against Chinese armies. For military success Kublai-Khan put 1,000 Jases of under his command. Atachi became Badur's direct commander. Under his command, Badur fought in China and later became second in command of the Jasin Guard. Badur participated in supression of local uprisings of Mongol regional rulers.
Badur was succeded by his son Betzelan. For his service, Betzelan was decorated by the imperor Yesun-Timour by two sets of imperor clothing, by Tiger Paitza,and by three pearls and weaponry (bow with arrows, and armour). Betzelan was succeded by his son Eliande.
Another famous Jasin family at Yuan court was that of the Jas Yuvashi, whose father Yanbadur (Elibadur) submitted to Mongolians together with Jasin warlord Kanguz. In 1258, on the orders of Moengke-Khan Yanbadur was accepted to the Jasin Guard. He also fought for the Imperor and was rewarded with golden jewellery. Yanbadur commanded Jasin army, fought against Arigbuka and Chinese insurgents, participated in capture of Siantan and Chinese cities on Yantze River.
As 'MANUER-sh*tZI' notes, in the war against the Chingizids, enemies of Yuan throne, the Jases fought in alliance with Kipchak regiments of Kublai_Khan's army. After the death of Yanbadur, his position was inherited by his son Yesudar, that commanded the Jasin regiments in the capture of Yanchzhou.
After the death of Yesudar, his younger brother Yuvashi became a commander of the Jasin regiment, 1,000 men strong. Yuvashbi, under command of warlord Bayan participated in many wars, was decorated by Golden Paitza, and was given title of 'great warlord of long-range campaigns'. During the supression of Nayan's rebellion, Yuvashi captured the leader. The Imperor gave him extensive gifts and titles, and title of 'warlord, the pillar of the state'.
His seccessors were his son Eikiratai (Eitzilitai) and his grandson Baichou.
Nigela (Nikola) and Elia (Ilia) came from noble Christian families, that embraced Mongol Rule by coming to Moengke-Khan with theri courtiers (30 men). Elia become famous in campaign against Soun and Lytan rebellion. His son served under Kublai-Khan and in 1312 became a leader of Jasin regiment 1,000 men strong, and later he became a commander of the Left Wing of the Jasin Guard.
Arslan was one of Jasin rulers, that submitted to Mongolian army without a fight, when they approached his city. Half of Arslan's warriors joined the Mongolian army.
His elder son, Asanchen was killed during a campaign when Mongolian army was attacked by 'tuerge' whom TU TZI identifies with Cherkes- sians.
Then Arslan sent to Mongolian militarty service his younger son Nigela (Nikola). Nigela distinguished himself in battles under Mongol commander Ulankhatai, who gave him a horse and gold.
Nigela was killed by an arrow in Soun war. His son Khourdudar (Khurduda) commanded a Jasin regiment, 100 men strong. At the orders of Kublai-Khan he fought the Nayan insurrection, and died from wounds. His son Khudu-Timour served in court of imperor Haisan, fought against armies of Haidu. Khudu-Timour was promoted to the position of Deputy of the Right Wing of Jasin Guard.
According to Chinese sources, 10,000 Jases served in Mongolian army in China, mostly in Jasin Guard. In 1286 the Jasin Guard was officially created. Jasin Guard took active part in wars against Soun and suffered heavy losses. In two regions of Yuan Empire: Chaokhe and Sougu, Jasin military settlements were organized. Their tasks included the equipment of the army with weapons and other military accessories. After Soun campaign all Jasin regiments were included in Jasin Guard.