Russia's Empress Catherine and Prussia's King Frederick II provoked a conflict between members of the Sejm and the King over civil rights for religious minorities, such as Protestants and Greek Orthodox whose positions, which were guaranteed equal with the Catholic majority by the Warsaw Confederation of 1573, had worsened considerably. Catherine and Frederick declared their support for the "szlachta" and their "liberties", and by October 1767 Russian troops had assembled outside Warsaw in support of the conservative Radom Confederation. The King and his adherents had little choice but to acquiesce to Russian demands. During the Repnin Sejm (named after the unofficially presiding Russian ambassador Nicholas Repnin) the King accepted the five "eternal and invariable principles" which Catherine had vowed to "protect for all time to come in the name of Poland's liberties": the election of kings, the right of "liberum veto", the right to renounce allegiance to and raise rebellion against the king ("rokosz"), the "szlachta" exclusive right to hold office and land, and landowners' power over their peasants. Thus all the privileges ("Golden Freedoms") of the nobility that had made the Commonwealth ungovernable were guaranteed as unalterable in the Cardinal Laws. The Cardinal Laws and the rights of "religious dissenters" passed by the Repnin Sejm were personally guaranteed by Empress Catherine. By these acts of legislation, for the first time, Russia formally intervened in the Commonwealth's constitutional affairs.