Wikipedia
Jaghun
Jaghun was a Mongol military unit of 100 men, created by Genghis Khan.
A bond of loyalty linked the Captains of the various other units. Along with Jaghun there was also Arban (10 men), Mingghan (1,000 men), and Tumen (10,000 men). There was also another unit composed of Body Guards for Genghis Khan.