Greifswald, Sweden's last possession in Pomerania, falls to
Frederick William, the Great Elector of Brandenburg.
Citation:
Editors. "The Great Elector takes Greifswald from Sweden".
The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16665, accessed 22 May 2013.]