Accession of Nicholas to the throne and the aftermath of Decembrist revolt accelerated Chernyshyov's career, who joined the close circle of tsar's most trusted officers. Nicholas appointed Chernyshyov to the commission investigating the revolt, and rewarded this service with titles of Count (1826), General of Cavalry (1827), a seat in State Council, and the appointment as acting Minister of War. "Acting" status was replaced with proper Minister of War appointment in 1832, which he held until 1852. Nicholas relied on Chernyshyov's personal experience in 1812 guerilla warfare in his handling of Caucasian War.