At the turn of 1918, anarchist detachments began to form in Siberia, including a cavalry division led by Nestor Kalandarishvil and a Red Guard detachment led by . In March 1918, Tretyakov's detachment attempted to establish a soviet in Kyakhta, but conflict with the local population forced them to flee to Irkutsk, where they were captured, disarmed and arrested by Centrosibir. With the collapse of the Eastern Front and the downfall of Soviet power in Siberia, Centrosibir had ceased to function by August 1918. This led to many leftists, including anarchists, fleeing to Mongolia to escape the White Terror, Nestor Kalandarishvili spearheaded the border crossing, leading between 800 and 1,500 people to the Mongolian village of Khatgal. They remained for a few weeks, recruiting a number of Mongols during their stay, before crossing the border back into Buryatia at Sanaga to fight a guerilla war against the Russian State. Anarchists, Left SRs and Maximalists also made up part of the guerilla forces of Alexander Kravchenko and Pyotr Shchetinkin, which led the re-assertion of Soviet power over Tuva in 1919.