The publication is dedicated to the 300th anniversary of the famous battle, called by Peter I "the mother of the Poltava battle." The book tells about one of the main events of the Northern War - the defeat by the army of Peter I near the Belarusian village of Lesnoy of the thousands of Swedish corps. This was the first significant victory of the Russian army renewed by Peter I and marked the triumph of the fortitude of the Orthodox army, which fought for faith and the Fatherland. The narrative is accompanied by numerous illustrations and maps that will help the reader plunge into the heroic past of the Russian and Belarusian peoples.