The Battle of Poltava was the decisive and largest battle of the Great Northern War. The Russian army under the command of Tsar Peter I defeated the Swedish army under the command of Carl Gustaf Rehnskiöld. The battle put an end to the status of the Swedish Empire as a European great power, as well as its eastbound expansion, and marked the beginning of Russian supremacy in eastern Europe.
During the course of six years in the initial stages of the war, King Charles XII and the Swedish Empire had defeated almost all participants in the anti-Swedish coalition, which initially consisted of the Polish-Lithuanian Commonwealth, Denmark-Norway and the Tsardom of Russia. The latter, under Tsar Peter I, was the only one still fighting.
Wikipedia https://en.wikipedia.org/wiki/Battle_of_Poltava
Address Полтава, Ukraine
Coordinates 49°37'44.861" N 34°32'30.451" E