What was Pyotr Wrangel's nickname?

Baron Pyotr Nikolayevich Wrangel (1878-1928) was a Russian officer in the Imperial Russian Army and later commanding general of the anti-Bolshevik White Army in Southern Russia in the later stages of the Russian Civil War. After his side lost the civil war in 1920, he left Russia and became one of the most prominent exiled White émigrés.Wrangel is immortalized by the nickname of "Black Baron" in the marching song The Red Army .