Inconclusive but bloody battle between the French and Russian armies near the East Prussian town of Eylau (now Bagrationovsk in Russia).
Citation:
Editors. "Battle of Eylau".
The Literary Encyclopedia. First published 01 February 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=4409, accessed 26 May 2013.]