Like his father Esim Khan Jangir was also concerned about the threat of the Dzungars, a Buddhist tribe who occupied the territory near present-day Xinjiang Province in western China and who were at constant warfare with the Muslim Uyghurs.
An active role in the implementation of foreign policy played by his son Tauke, he established friendly relations with the ruler of Samarkand Zhalantos Bahadur (1576-1656).
When Erdeni Batur in 1643 seized some land in the southern and south-eastern spurs of the Tian Shan, Jangir with the host 600 people decided to meet the enemy's army, despite its significant superiority (Zhungars was about 50,000).
Researchers who carefully studied the place of the famous battle, note that a number of complex Jangir applied tactics of the arsenal of military art of the Kazakhs, but at the same time used the unextended fragmentation methods among the nomads of the enemy.
Levshin, Jangir, fearing an open military confrontation with Dzhungars, arranged part of his squad in a gorge between two mountains, he dug in advance by a deep moat and high obnesya shaft.