Editors. "Emperor's forces defeat Frederick II at Kollin". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17709, accessed 22 May 2013.]
At the Battle of Kollin, forces of the Holy Roman Emperor Francis I defeat Frederick II of Prussia, who loses 13 000 of his 33 000 troops.