events
October 13, 1644
A Swedish–Dutch fleet defeats the Danish fleet at Fehmarn and captures about 1,000 prisoners.
Battle of Fehmarn (1644)
The Battle of Fehmarn (1644) took place north-west of the island of Fehmarn, now part of Germany, in the Baltic Sea. A combined Swedish fleet, with a large element of hired Dutch ships, defeated a Danish-Norwegian fleet and took 1,000 prisoners, including Ulfeldt, Grabov and von Jasmund. The Danish admiral Pros Mund was killed in the battle.