The publication is a detailed and most complete description of the history of the three-month battle of the Soviet-Finnish war of 1939-1940 in the area of the Taipaleen-Yoki River (now the Burnaya River), on the easternmost flank of the Mannerheim Line. The book is based on numerous archival and documentary sources and gives a broad idea of the conditions of military life of both Soviet and Finnish troops. The book is intended for a wide range of readers interested in Russian military history and the history of the Karelian Isthmus.