Editors. "Treaty of St. Petersburg between Russia and Prussia". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17779, accessed 19 April 2014.]
Russia and Prussia sign the Treaty of St. Petersburg. By the terms of this agreement, Russia restores all the territory it had seized from its Prussian neighbour, and a defensive and offensive alliance is formed. This treaty removes Russia from the theatre of the Seven Years' War, and allows Frederick II of Prussia to concentrate his resources on his other European enemies.