The Battle of Öland was a naval battle between an allied Danish-Dutch fleet and the Swedish navy in the Baltic Sea, off the east coast of Öland on 1 June 1676. The battle was a part of the Scanian War fought for supremacy over the southern Baltic. Sweden was in urgent need of reinforcements for its north German possessions; Denmark sought to ferry an army to Scania in southern Sweden to open a front on Swedish soil.
Just as the battle began, the Swedish flagship Kronan sank, taking with it almost the entire crew, including the Admiral of the Realm and commander of the Swedish navy, Lorentz Creutz. The allied force under the leadership of the Dutch admiral Cornelis Tromp took full advantage of the ensuing disorder on the Swedish side. The acting commander after Creutz's sudden demise, Admiral Claes Uggla, was surrounded and his flagship Svärdet battered in a drawn-out artillery duel, then set ablaze by a fire ship. Uggla drowned while escaping the burning ship, and with the loss of a second supreme commander, the rest of the Swedish fleet fled in disorder.
The battle resulted in Danish naval supremacy, which was upheld throughout the war.