Editors. "The Duke of Parma forces Henry IV to raise the siege of Paris". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15413, accessed 17 April 2014.]
The Duke of Parma, Spanish-appointed Governor of the Netherlands, advances into France from across its northern border, and forces Henry IV to abandon his attempted siege of Paris.