Viewing Krasnov as unreliable and untrustworthy, Denikin instead decided to launch the Second Kuban Campaign of June–November 1918, taking his army south to the territory of the Kuban Cossack Host to raise more men and to take on the Red North Caucasian Army before turning north towards Moscow, which had become the Soviet capital in March 1918. Denikin viewed the Kuban Cossacks as more willing to help than Krasnov and his Don Cossacks, who tended to put their own interests first. Denikin also believed that he needed to liquidate the 70,000-strong Red North Caucasian Army first before advancing on Moscow, arguing that an advance on Moscow would be impossible with a threat to his rear. Denikin's decision to turn the Volunteer Army south to the Kuban rather than north to Moscow became one of the most controversial of the Russian Civil War - by not advancing north in 1918 Denikin missed his best chance of linking up with the White forces in Siberia under Admiral Alexander Kolchak, who were advancing west along the Trans-Siberian Railway in the direction of Moscow.