Editors. "John Casimir signs a treaty with the French Huguenot leaders". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15187, accessed 21 April 2014.]
John Casimir, son of Frederick III, Elector Palatine, signs a treaty with the French Huguenot leaders. Aided by an English subsidy, he arranges to bring an army of 16,000 German and Swiss mercenaries to France to aid the Protestant cause.