The Pacification Sejm was a session of the Sejm

Sejm

The Sejm is the lower house of the Polish parliament. The Sejm is made up of 460 deputies, or Poseł in Polish . It is elected by universal ballot and is presided over by a speaker called the Marshal of the Sejm ....

 in 1736 that concluded the War of the Polish Succession

War of the Polish Succession

The War of the Polish Succession was a major European war for princes' possessions sparked by a Polish civil war over the succession to Augustus II, King of Poland that other European powers widened in pursuit of their own national interests...

 in 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...

 that erupted after the death of Augustus II the Strong

Augustus II the Strong

Frederick Augustus I or Augustus II the Strong was Elector of Saxony and King of Poland and Grand Duke of Lithuania ....

 in February 1733. It confirmed the accession of Augustus III

Augustus III of Poland

Augustus III, known as the Saxon ; ; also Prince-elector Friedrich August II was the Elector of Saxony in 1733-1763, as Frederick Augustus II , King of Poland and Grand Duke of Lithuania in 1734-1763.-Biography:Augustus was the only legitimate son of Augustus II the Strong, Imperial Prince-Elector...

 to the Polish throne, and gave Augustus the power to appoint as Duke of Courland

Duchy of Courland and Semigallia

The Duchy of Courland and Semigallia is the name of a duchy in the Baltic region that existed from 1562 to 1569 as a vassal state of the Grand Duchy of Lithuania and from 1569...

 a candidate who had the approval of Russia, Prussia, and the local nobility. (This power was in effect a retroactive approval of Augustus' agreement with Anna of Russia

Anna of Russia

Anna of Russia or Anna Ivanovna reigned as Duchess of Courland from 1711 to 1730 and as Empress of Russia from 1730 to 1740.-Accession to the throne:Anna was the daughter of Ivan V of Russia, as well as the niece of Peter the Great...

 that she could name her preferred candidate, Ernst Johann von Biron

Ernst Johann von Biron

Ernst Johann von Biron was a Duke of Courland and Semigallia and regent of the Russian Empire .-Biography:Born as Ernst Johann Biren in Kalnciems, Courland, he was the grandson of a groom in the service of Jacob Kettler, Duke of Courland, who bestowed upon him a small estate, which Biron's...

, to that post.)