Battle of Hörnefors
1809 CE.
Shown on the map at 63.624°, 19.912°.
The Battle of Hörnefors took place during the Finnish War, on 5 July 1809, when 2,400 Swedes under Johan August Sandels went on a counter-offensive against 3,350 Russians under Ilya Alekseyev and Pavel Shuvalov, at Hörnefors, Sweden. After more than two hours of intense fighting along the Hörnån (river) Sandels ordered a retreat, after having been misinformed of a greater Russian flanking attack.
Text from the Wikipedia article Battle of Hörnefors, licensed CC BY-SA 4.0.