The Sandomierz Confederation was an anti- Swedish

confederation A confederation (also known as a confederacy or league) is a political union of sovereign states united for purposes of common action. Usually created by a treaty, confederations of states tend to be established for dealing with critical issu ...

, formed on 20 May 1704 in defense of the King of Poland,

August II the Strong Augustus II the Strong (12 May 1670 – 1 February 1733), was Elector of Saxony from 1694 as well as King of Poland and Grand Duke of Lithuania from 1697 to 1706 and from 1709 until his death in 1733. He belonged to the Albertine branch of the H ...

. It was formed in reaction to the

Warsaw Confederation The Warsaw Confederation, also called the Compact of Warsaw, was a political-legal act signed in Warsaw on 28 January 1573 by the first Convocation Sejm (''Sejm konwokacyjny'') held in the Polish Commonwealth. Convened and deliberating as a co ...

, and its marshal was Stanisław Ernest Denhoff. The confederation lasted until 1717, when it was disbanded by the

Silent Sejm Silent Sejm (), also known as the Mute Sejm, is the name given to the session of the Sejm parliament of the Polish–Lithuanian Commonwealth of 1 February 1717 held in Warsaw. A civil war in the Commonwealth was used by the Russian Tsar Peter the ...

. Members of the confederation mostly consisted of

nobility Nobility is a social class found in many societies that have an aristocracy. It is normally appointed by and ranked immediately below royalty. Nobility has often been an estate of the realm with many exclusive functions and characteristics. T ...

from

Lesser Poland Lesser Poland, often known by its Polish name ''Małopolska'' (; ), is a historical region situated in southern and south-eastern Poland. Its capital and largest city is Kraków. Throughout centuries, Lesser Poland developed a separate cult ...

, who supported the

Electorate of Saxony The Electorate of Saxony, also known as Electoral Saxony ( or ), was a territory of the Holy Roman Empire from 1356 to 1806 initially centred on Wittenberg that came to include areas around the cities of Dresden, Leipzig and Chemnitz. It was a ...

, whose ruler August II also was king of Poland. Its forming resulted in a three-year civil war between the two camps. In its initial stages, Swedish side had the upper hand, and the Warsaw Confederation was eventually victorious in the civil war in Poland (1704-1706), which ended with the

Treaty of Altranstädt (1706) The Treaty of Altranstädt was concluded between Charles XII of Sweden and Augustus the Strong of Saxony and Poland–Lithuania, on 13 October 1706, during the Great Northern War. Augustus had to renounce his claims to the Polish throne and hi ...

. Soon, however, after Swedish defeat in the

Great Northern War In the Great Northern War (1700–1721) a coalition led by the Tsardom of Russia successfully contested the supremacy of the Swedish Empire in Northern Europe, Northern, Central Europe, Central and Eastern Europe. The initial leaders of the ant ...

, the Russians prevailed and August II resumed the Polish throne in 1709.

See also