Pavel Rafalovich Bermondt-Avalov was an Ussuri Cossack and warlord. Bermondt-Avalov was appointed to lead the German-established Russian army (subsequently frequently known after his name as "the Bermontians") which was meant to go to fight the Bolsheviks in the Russian Civil War, but, believing that communists would be defeated without his help, Pavel Bermondt-Avalov decided to strike against the newly independent nations of Lithuania and Latvia instead. Wikipedia
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