The Battle of Kunersdorf involved over 100,000 men. An Allied army commanded by Pyotr Saltykov and Ernst Gideon von Laudon that included 41,000 Russians and 18,500 Austrians defeated Frederick the Great's army of 50,900 Prussians.

The terrain complicated battle tactics for both sides, but the Russians and the Austrians, having arrived in the area first, were able to overcome many of its difficulties by strengthening a causeway between two small ponds. They had also devised a solution to Frederick's deadly modus operandi, the oblique order. Although Frederick's troops initially gained the upper hand in the battle, the sheer number of Allied troops gave the Russians and Austrians an advantage. By afternoon, when the combatants were exhausted, fresh Austrian troops thrown into the fray secured the Allied victory.

This was the only time in the Seven Years' War that the Prussian Army, under Frederick's direct command, disintegrated into an undisciplined mass. With this loss, Berlin, only 80 kilometers (50 mi) away, lay open to assault by the Russians and Austrians. However, Saltykov and Laudon did not follow up on the victory due to disagreement.