The Battle of Warsaw (; ; ) took place near Warsaw on , between the armies of the Polish–Lithuanian Commonwealth and Sweden and Brandenburg. It was a major battle in the Second Northern War between Poland and Sweden in the period 1655–1660, also known as The Deluge. According to Hajo Holborn, it marked "the beginning of Prussian military history".
In the battle, a smaller Swedish-Brandenburg force, but with the fire superiority of infantry and artillery, gained tactical victory over a Polish–Lithuanian force superior in numbers, though in the long term the victory achieved little. Polish–Lithuanian losses were insignificant, since the Polish-Lithuanian forces, including the sizeable noble levy, retreated in good order from the battlefield.
Background
The Polish–Lithuanian forces, commanded by King John II Casimir of Poland, comprised about 24–25,000 regulars, which included only 950 Winged Hussars (8 banners), 2,000 Tatars and 10–13,000 of the noble levy (pospolite ruszenie), altogether some 40,000 men of which only about 4,500 were infantry. The kozacka cavalry, the pancerna, did not participate in the attack, being held in reserve. John Casimir quickly regrouped at Lublin.