The Battle of Eylau was a major contrast to the decisive victories that characterized Napoleon's earlier campaigns. By halting the French advance and leaving the two sides exhausted but evenly matched, it served only to prolong the war. After the battle Napoleon sent Gen. Bertrand to the King of Prussia to offer a separate peace, which would see French forces withdraw from Prussia and her borders completely restored. Prussia, wishing to continue its alliance with Russia, quickly rejected this offer. Hostilities continued until the decisive French victory at the Battle of Friedland in June 1807 forced Tsar Alexander I to the negotiating table. After a personal meeting between the two emperors, both sides signed the peace Treaties of Tilsit. They were much harsher on Prussia than the earlier peace offer, resulting in the loss of almost half of its territory.