Editors. "The Count of Nassau is forced to abandon the siege of Peronne". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14571, accessed 24 April 2014.]
The Count of Nassau, in the service of Holy Roman Emperor Charles V, is forced to abandon the siege of Peronne, in Picardie.