The Katharan Liberation Army (usually abbreviated to KLA) was an Ognian nationalist paramilitary group active between 1903 and 1918 (a splinter group remained active until 1972) which considered itself to be the successor faction to the Kingdom of K'athar. Following the Kingdom's collapse in 1903, a group of loyalist K'atharans began to resist the Russian Imperial rule in the area. At first the group was only minor, and practically unnoticed by the Russian authorities, but after a few years it began to gain a wide support among the AIP population, as they were often treated harshly by the Russians, who had been waging war against them since the 1830s.