Khatanbaatar Magsarjav (Mongolian: Хатанбаатар Магсаржав, firm hero Magsarjav, 1877 - September 3, 1927) was a Mongolian general and a leading figure in Mongolia's struggle for independence. His contingent of elite 800 Mongol soldiers fought White Russians and Chinese forces over 30 times between 1912 and 1921, without a single defeat. He is often noted by historians as one of the few Mongol figures of which both Russians and Chinese were afraid. He served as acting prime minister from February 15, 1921 to March 13, 1921, under Roman Ungern von Sternberg's puppet regime and then later as minister of the army in the 1920s. He received the additional title Ardyn Khatanbaatar Magsarjav (Mongolian: Ардын Хатанбаатар Магсаржав, People's firm hero Magsarjav) in 1924.