Potemkin period can be called the time of the consolidation of Kucuk Kaynarca treaty. First of all, in the south. Steppes between the Bug and the Dnieper, claims on which it refused to Turkey, was the territory of Zaporizhzhya Sich. As long as the Cossacks needed help in the fight against the Crimean Tatars, Catherine tolerated them. As soon as the war was over, the Empress decided to get rid of them. Member of the Russian Academy of Sciences historian Gerhard Friedrich Muller, in response to a request by Nikita Panin, made a note, it is proved that the Cossacks no political privileges have not had. Zaporizhzhya Sich usually referred to certificates issued to her and Stefan Batory BogdanomHmelnitskim. Mueller proved that the letters were forged, that the Cossacks - it's part of the Ukrainian Cossacks, and therefore their claims for political special rights have no basis. Catherine cared no historical precedents. It is believed that the Zaporizhzhya Sich prevent the consolidation of the central government in New Russia - a vast, increased as a result of new conquests of territory between the Black and Azov seas. The manifesto, signed August 5, 1775, declared: "We want this to inform our loyal subjects of the Empire, that finally destroyed the Zaporizhzhya Sich, the future is prohibited even the name of the Zaporozhye Cossacks, for the bold actions of these Cossacks violates our high orders, insulted Our Imperial Majesty" 69. Prohibition was the name of finding Catherine. After the uprising Pugacheva river Yaik renamed into the Ural River, for Yaik Cossacks were the first to respond to the call of the False Peter III.