Caucasus Line Cossack Host
Caucasus Line Cossack Host (Кавказское линейное казачье войско) was a Cossack host created in 1832 to 1860 for the purpose of conquest of the Northern Caucasus. Together with the Black Sea Cossack Host, it defended the Caucasus Fortified Defense Line from the inlet of Terek River to the inlet of Kuban River while the lower reaches of the Kuban were occupied by the Black Sea army.
Source: Wikipedia — Caucasus Line Cossack Host (CC BY-SA 4.0)