Editors. "The Swabian League expels Ulrich Duke of Wurttemburg from his duchy". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14885, accessed 22 May 2013.]
Ulrich, Duke of Wurttemburg attacks the free city of Reutlingen and defies his nobility. The Swabian League, under Franz von Sickingen, expels Ulrich from his duchy, which is taken under imperial control.