Battle of Eylau
In August 1800, Essen was appointed military governor of Vyborg, Finland, and chief of the garrison of the Gorchakov [Vyborg] regiment. In 1802 he was appointed head of the Vyborg and Shlisselbourg musketeer regiments. In 1807 he was awarded the Order of St. George, third class, for his actions in the Battle of Eylau.