The Hetmanate was founded by the Hetman of Zaporizhian Host Bohdan Khmelnytsky during the Uprising of 1648–57. Establishment of vassal relations with the Tsardom of Russia in the Treaty of Pereyaslav of 1654 is considered a benchmark of the Cossack Hetmanate in Soviet, Ukrainian, and Russian historiography. The second Pereyaslav Council in 1659 further restricted the independence of the Hetmanate, and from the Russian side there were attempts to declare agreements reached with Yurii Khmelnytsky in 1659 as nothing more than the "former Bohdan's agreements" of 1654. The 1667 Treaty of Andrusovo – conducted without any representation from the Cossack Hetmanate – established borders between the Polish and Russian states, dividing the Hetmanate in half along the Dnieper and putting the Zaporizhian Sich under a formal joint Russian-Polish administration.