At a Convention at Leipzig, the German Protestant Princes reach a
decision to form an alliance with Gustavus II of Sweden.
Citation:
Editors. "German Protestant Princes decide to ally with Gustavus II".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16016, accessed 25 May 2013.]