Editors. "The German Catholic League is persuaded to fight for Ferdinand II". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15841, accessed 19 April 2014.]
At the German Catholic League in Würzburg, Maximilian of Bavaria persuades them to raise an army of 21 000 foot-soldiers and 4000 cavalry to fight for Emperor Ferdinand II against the Bohemian nationalists.