The Battle of Prostki was fought near Prostki

Prostki

Prostki is a village in Ełk County, Warmian-Masurian Voivodeship, in northern Poland. It is the seat of the gmina called Gmina Prostki...

 (today in Ełk County, Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

) on October 8, 1656 between forces of the Polish-Lithuanian Commonwealth

Polish-Lithuanian Commonwealth

The Polish–Lithuanian Commonwealth was a dualistic state of Poland and Lithuania ruled by a common monarch. It was the largest and one of the most populous countries of 16th- and 17th‑century Europe with some and a multi-ethnic population of 11 million at its peak in the early 17th century...

 and allied Crimean Tatars

Crimean Khanate

Crimean Khanate, or Khanate of Crimea , was a state ruled by Crimean Tatars from 1441 to 1783. Its native name was . Its khans were the patrilineal descendants of Toqa Temür, the thirteenth son of Jochi and grandson of Genghis Khan...

 (2,000 man) commanded by hetman

Hetmans of Polish-Lithuanian Commonwealth

Hetmans of the Polish–Lithuanian Commonwealth were the highest-ranking military officers, second only to the King, in the Polish–Lithuanian Commonwealth. The first Polish title of Grand Crown Hetman was created in 1505. The title of hetman was given to the leader of Polish Army and till 1581 it was...

 Wincenty Gosiewski

Wincenty Korwin Gosiewski

Wincenty Korwin Gosiewski was a Polish-Lithuanian politician and military commander, a notable member of the szlachta.-Life:...

 on one side, and on the other allied Swedish

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 and Brandenburg

Brandenburg-Prussia

Brandenburg-Prussia is the historiographic denomination for the Early Modern realm of the Brandenburgian Hohenzollerns between 1618 and 1701. Based in the Electorate of Brandenburg, the main branch of the Hohenzollern intermarried with the branch ruling the Duchy of Prussia, and secured succession...

 forces commanded by Prince Georg Friedrich of Waldeck

Prince Georg Friedrich of Waldeck

Prince Georg Friedrich of Waldeck was a German and Dutch Field Marshal .In 1641, Waldeck entered the service of the States-General of the Netherlands; later in 1651, in the service of Brandenburg, he reached the highest rank as minister...

, reinforced by cavalry of Prince Bogusław Radziwiłł. The Commonwealth forces won the battle, annihilating enemy forces and taking Radziwiłł captive.