The Amur Cossack Host (Russian: Амурское казачье войско), a Cossack host created in the Amur region and Primorye in the 1850s on the basis of the Cossacks relocated from the Transbaikal region and freed miners of Nerchinsk region. The Amur Cossack Host took part in the suppression of the Boxer Rebellion in China, Russo-Japanese War of 1904-1905 and World War I. During the Russian Civil War, a significant number of the Amur Cossacks fought on the side of the Soviets.