Pereyaslav Agreement, Pereyaslav also spelled PerejasŁaw,  (Jan. 18 [Jan. 8, Old Style], 1654), act undertaken by the rada (council) of the Cossack army in Ukraine to submit Ukraine to Russian rule, and the acceptance of this act by emissaries of the Russian tsar Alexis; the agreement precipitated a war between Poland and Russia (1654–67).
The hetman of the Zaporozhian Cossacks, ... Читать дальше »