Editors. "Gustavus II lands in Pomerania and marches his army into Germany". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16008, accessed 19 May 2013.]
Gustavus II of Sweden lands in Pomerania and marches his army into Germany, entering into the Thirty Years War for the first time in hostility to Emperor Ferdinand II.