Johan Dorrien
Command Ratings
XX 03 in Hanover
Johan Dorrien (11 October 1746 – 18 October 1813)
Johan Dorrien was a Danish cavalry officer of Hamburg birth who rose to generalmajor during the Napoleonic era. His career is chiefly associated with Denmark’s mounted arm in the duchies, with repeated postings to Holstein and Schleswig, and with responsibility for mobile formations along the southern frontier during the crisis years of 1806–1808.
Origins and entry into service
Born in Hamburg to a merchant family, Dorrien entered Danish service in 1770 as a cadet. In 1776, he and his elder brother were ennobled by Emperor Joseph II into the imperial nobility (the rigsadel/Reichsadel), a status that reflected the family’s standing and trans-regional connections.
Military career
Dorrien’s service followed the classic cavalry ladder of the late eighteenth century—slow promotions, regiment-to-regiment transfers, then accelerated responsibility as Denmark’s strategic situation deteriorated.
Selected service timeline
- 1770: Danish cadet; commissioned sekondløjtnant in the Holstein dragoon regiment (later styled Ryttere).
- 1777: Promoted premierløjtnant.
- 1783: Promoted ritmester.
- 1788–1789: Major with the Akershusiske Dragoner; then transferred in the same rank to the Fynske Dragoner.
- 1791: Promoted oberstløjtnant with the Holstein Ryttere.
- 1803: Promoted oberst and made deputy commander of the regiment.
- 1806: Appointed regimental chief of the Jyske Regiment lette Dragoner; commanded a cavalry brigade on the southern border.
- 1807: At the outbreak of war, held dispersed combined-arms detachments between the Schlei (Slien) and the Eider (Ejderen); later commanded in central Schleswig under Prince Charles of Hesse (Carl af Hessen).
- 1808: Promoted generalmajor; appointed chief of the Holstein Ryttere.
- 1812: Named commander of 2nd Brigade in the “mobile army division” (bevægelige Armédivision).
1813 and death
Ill health forced Dorrien to take leave in June 1813, and he did not participate in the ensuing operations. He died later that year in Flensburg. Contemporary judgment, as preserved in later biographical compilations, is consistent: he was regarded as conscientious, duty-bound, and personally esteemed by King Frederik VI—praise of the untheatrical sort that, in soldierly circles, is often the most durable.
Family
Dorrien married Sophie Amalie (née Stemann) and had seven children. One son later entered the Danish nobility by patent in the mid-nineteenth century, extending the family’s formal status within Denmark beyond the earlier imperial ennoblement.
Sources
XX 03 in Hanover