Nikolai Robert Maximilian Freiherr von Ungern-Sternberg, often referred to as Roman von Ungern-Sternberg or Baron Ungern, was an anti-communist general in the Russian Civil War and then an independent warlord who intervened in Mongolia against China. A part of the Russian Empire's Baltic German minority, Ungern was an ultraconservative monarchist who aspired to restore the Russian monarchy after the 1917 Russian Revolutions and to revive the Mongol Empire under the rule of the Bogd Khan. His attraction to Vajrayana Buddhism and his eccentric, often violent, treatment of enemies and his own men earned him the sobriquet "the Mad Baron" or "the Bloody Baron".
