 In 1803 he commanded the pontoon artillery companies, later pontoon artillery regiment.Since 1806, Papkov served as brigadier-commander of the 14th artillery brigade, with which he participated in the Battle of Gutstadt, Battle of Heilsberg and Battle of Friedland, was decorated with a Prussian order "For Merits", and on December 21, 1807 resigned from military service in the rank of mayor-general.In 1808 he was appointed Chief Police Officer (Oberpolizeimeister) of Saint Petersburg and was awarded with an Order of St. George of 3rd degree on April 21, 1808.