Brandenburg and France sign the Peace of Vossem. By the terms of
this agreement, the Great Elector Frederick William promises not to
support any enemies of Louis XIV.
Citation:
Editors. "Peace of Vossem between Brandenburg and France".
The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16588, accessed 23 May 2013.]