Holy Roman Emperor Charles V asserts his power over the Duke of
Cleves, who is an ally of Francis I. He compels the Duke to yield
the territories of Gelderland and Zutphen to the Netherlands, and
to discontinue his alliances with France, Denmark and Sweden.
Citation:
Editors. "Charles V manipulates the Duke of Cleves".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14689, accessed 25 May 2013.]