The monograph presents the results of the study of the famous battle for more than twenty years, Doctor of Historical Sciences, Professor of the Faculty of History of St. Petersburg State University, Academician of the Academy of Military Historical Sciences P.A. Krotov. The reader will find in the book answers to a wide range of questions related to the understanding of the figure of Peter the Great as a commander. What is the greatness of the "hero of Poltava"?