Swedish King Charles X Gustav in skirmish with Polish Tatars near Warsaw 1656

The Battle of Warsaw (German: Schlacht von Warschau; Polish: Bitwa pod Warszawą; Swedish: Tredagarsslaget vid Warszawa) was a battle which took place near Warsaw on July 28–July 30 [O.S. July 18–20] 1656, between the armies of the Polish-Lithuanian Commonwealth on the one hand and of Sweden and Brandenburg on the other. 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".

• http://en.wikipedia.org/wiki/Battle of Warsaw (1656)