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In page Chechnya:

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The resistance of the Nakh tribes never ended and was a fertile ground for a new Muslim-Avar commander, Imam Shamil, who fought against the Russians from 1834 to 1859 (see Murid War). In 1859, Shamil was captured by the Russians at aul Gunib. Shamil left Baysangur of Benoa,[6] a Chechen with one arm, one eye, and one leg, in charge of command at Gunib. Baysangur broke through the siege and continued to fight Russia for another two years until he was captured and killed by Russians. The Russian Tsar hoped that by sparing the life of Shamil, the resistance in the North Caucasus would stop, but it did not. Russia began to use a colonization tactic by destroying Nakh settlements and building Cossack defense lines in the lowlands.[citation needed]