Baron Roman Fedorovich von Ungern-Sternberg (1885–1921) was a Baltic German aristocrat and tsarist military officer who fought against the Bolsheviks in Eastern Siberia during the Russian Civil War. From there he established himself as the de facto warlord of Outer Mongolia, the base for a fantastical plan to restore the Russian and Chinese empires, which then ended with his capture and execution by the Red Army as the war drew to a close. In The Baron's Cloak, Willard Sunderland tells the epic story of the Russian Empire's final decades through the arc of the Baron's life, which spanned the vast reaches of Eurasia. Tracking Ungern's movements, he transits through the Empire's multinational borderlands, where the country bumped up against three other doomed empires, the Habsburg, Ottoman, and Qing, and where the violence unleashed by war, revolution, and imperial collapse was particularly vicious. In compulsively readable prose that draws on wide-ranging research in multiple