The treaty of Rinsk, concluded on 2 November (O.S.

Old Style and New Style dates

Old Style and New Style are used in English language historical studies either to indicate that the start of the Julian year has been adjusted to start on 1 January even though documents written at the time use a different start of year ; or to indicate that a date conforms to the Julian...

) / 12 November (N.S.

Old Style and New Style dates

Old Style and New Style are used in English language historical studies either to indicate that the start of the Julian year has been adjusted to start on 1 January even though documents written at the time use a different start of year ; or to indicate that a date conforms to the Julian...

) 1655, was a Ducal-Royal Prussia

Royal Prussia

Royal Prussia was a Region of the Kingdom of Poland and of the Polish-Lithuanian Commonwealth . Polish Prussia included Pomerelia, Chełmno Land , Malbork Voivodeship , Gdańsk , Toruń , and Elbląg . It is distinguished from Ducal Prussia...

n alliance during the Second Northern War

Second Northern War

The Second Northern War was fought between Sweden and its adversaries the Polish–Lithuanian Commonwealth , Russia , Brandenburg-Prussia , the Habsburg Monarchy and Denmark–Norway...

. Frederick William I, Elector of Brandenburg and duke of Prussia, and the nobles of Royal Prussia agreed to allow Brandenburgian garrisons in Royal Prussia to defend it against the imminent Swedish

Swedish Empire

The Swedish Empire refers to the Kingdom of Sweden between 1561 and 1721 . During this time, Sweden was one of the great European powers. In Swedish, the period is called Stormaktstiden, literally meaning "the Great Power Era"...

 invasion. The important towns of Danzig (Gdansk), Thorn

Torun

Toruń is an ancient city in northern Poland, on the Vistula River. Its population is more than 205,934 as of June 2009. Toruń is one of the oldest cities in Poland. The medieval old town of Toruń is the birthplace of the astronomer Nicolaus Copernicus....

 (Toruń) and Elbing

Elblag

Elbląg is a city in northern Poland with 127,892 inhabitants . It is the capital of Elbląg County and has been assigned to the Warmian-Masurian Voivodeship since 1999. Before then it was the capital of Elbląg Voivodeship and a county seat in Gdańsk Voivodeship...

 (Elbląg) did not participate in the treaty and were not garrisoned by Brandenburgian troops, and except for Danzig surrendered to Sweden. The remainder of Royal Prussia, except for Marienburg

Malbork

Malbork is a town in northern Poland in the Żuławy region , with 38,478 inhabitants . Situated in the Pomeranian Voivodeship since 1999, it was previously assigned to Elbląg Voivodeship...

 (Malbork) was overrun by Sweden and Frederick William I's forces pursued to Königsberg

Königsberg

Königsberg was the capital of East Prussia from the Late Middle Ages until 1945 as well as the northernmost and easternmost German city with 286,666 inhabitants . Due to the multicultural society in and around the city, there are several local names for it...

 (now Kaliningrad

Kaliningrad

Kaliningrad is a seaport and the administrative center of Kaliningrad Oblast, the Russian exclave between Poland and Lithuania on the Baltic Sea...

), where he was forced to accept Swedish overlordship in the Treaty of Königsberg

Treaty of Königsberg (1656)

The Treaty of Königsberg was concluded on 7 January / 17 January 1656 during the Second Northern War. Frederick William I, the "Great Elector" of Brandenburg and duke of Prussia, was forced to join the Swedish camp and became a Swedish vassal for the Duchy of Prussia and Ermland...

in January 1656.