 September 4, 1815 he was promoted to the rank of staff-captain (of cavalry) (штабс-ротмистр) of a corps stationed in France and aide-de-camp to Russian general Count Mikhail Semyonovich Vorontsov.August 1, 1816 von Pfeilitzer-Franck was assigned to a dragoon regiment in Tver, and in December 1817 to Leib Guards of the dragoon regiment and was promoted to the rank of lieutenant-colonel.July 21, 1822 he was appointed aide-de-camps to Governor-General of Novorossiysk, Count Mikhail Semyonovich Vorontsov, and assigned as Rittmeister to Leib Guards of uhlan regiment; July 14, 1823 was promoted to the rank of colonel by Count Vorontsov.