Martin Luther tells the Protestant princes of Germany that rather
than accept a compromise with the Emperor Charles V, they should
instead prepare for war.
Citation:
Editors. "Martin Luther advises the Protestant princes not to compromise".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14450, accessed 20 June 2013.]