Editors. "Elector of Brandenburg and Duke of Neuburg both claim Jülich-Cleves". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15663, accessed 20 April 2014.]
John William, the last Duke of Jülich-Cleves, dies without heirs. In response, the Elector of Brandenburg and Duke of Neuburg both claim succession to the duchy. Henry IV of France throws his support behind the claim of Brandenburg.