Action of 30 May 1564

This battle took place on 30–31 May 1564 between the islands of Gotland and Öland, between a fleet of Allied ships, the Danes under Herluf Trolle and the Lübeckers under de, and a Swedish fleet of 23 or more ships under sv. It was an Allied victory.

Only some of the ships on each side were involved, the rest being unable to help due to the wind. On 30 May Fortuna was damaged and Lange Bark sunk, but on 31 May Mars was boarded by Byens Løffue, Engel and Fuchs before catching alight and exploding, killing most of its crew and 300 boarders. Jakob Bagge and his Second, sv, were taken prisoner. Swedish casualties apart from in this ship were 101. Fleming took over the fleet and sailed it back to sv, while the Danes sailed to Copenhagen.

Denmark/Lübeck

 * Fortuna (flag)
 * Byens Løffue 56
 * Engel (Lübeck flag)
 * Lange Bark (Lübeck) — sunk 30 May
 * Arck
 * Fuchs (Lübeck)
 * other ships

Sweden

 * Mars 173 (flag) — blew up 31 May
 * Elefant 65 (Fleming)
 * Finska Svan 82
 * Svenska Hektor 87
 * 19 or more other ships