At the Battle of Gross Jägersdorf, a Russian force secures victory
over Frederick II's Prussian troops. The Russians go on to occupy
East Prussia but then withdraw.
Citation:
Editors. "Russian victory over Prussians at Gross Jägersdorf".
The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17711, accessed 20 June 2013.]