The Confederation's marshal was Stanisław Ledóchowski. The Tarnogród Confederation was only the last and most notable of several confederations formed against Augustus at that time. The Confederates were supported by most of the Commonwealth's own army. The Russians entered the country, but did not participate in any major engagements. They bided their time, as Peter posed as the mediator between the Commonwealth's king and its szlachta. Crucially, the Russians did not support the Confederates as promised, and instead insisted on bringing both sides to the negotiating table. The civil war lasted for a year and the outcome hung in the balance. Saxon forces under the command of Jacob Heinrich von Flemming enjoyed military superiority, advanced south-eastwards and took Zamość (this victory was however accomplished less through military tactics than through diplomacy and a treachery). The confederates then pushed back, entered Wielkopolska, and took Poznań. They gained some support from a local Wielkopolska confederation and from Lithuania. Neither side was however posed to achieve victory, and the Russian pressure mounted; eventually the Russians declared that they would consider any side that refused to enter into negotiations an enemy, and open hostilities against them. Unable to defeat the Confederates, many of whom still saw Peter as the protector of their rights (and some of whom hoped for Augustus to be deposed), Augustus agreed to open the negotiations with Russians acting as arbitrators. The Russians were represented by a delegation headed by prince Grigori Dolgorukov (1657—1723). A peace treaty between the Confederates and the Augustus was signed on 3 or 4 November 1716, as relations between the Confederates and the Russians deteriorated. The Russians made it increasingly apparent that their goals were not wholly benign to the Commonwealth. Finally, a Sejm session was called for 1 February 1717. Sejm To prevent the use of liberum veto from disrupting Sejm proceedings, the session was turned into a confederated sejm. (It was also a pacification sejm). Threatened by a strong Russian army, with Russian soldiers "guarding" the proceedings, the Silent Sejm was known as such because only the speaker (marshal of the Sejm) Stanisław Ledóchowski (podkomorzy krzemienicki), and a few selected other deputies were allowed a voice, outlining the terms of the settlement. Other names for the Sejm in the English language include Dumb or Muted. The terms themselves were significantly designed by Peter the Great. The Sejm lasted for one day only, or more