8vo - 20 x 14.5 cm.; Three volume set. Text is in Polish. All maps present. Porwit (1895-1988) was a Polish military officer and historian. He commanded a part of the Polish front during the Siege of Warsaw in 1939, was captured and spent the balance of the war as a POW. After a brief time in London with the Sikorski Institute, Porwit returned to Warsaw in 1946. White cloth-covered boards with red and black spine decoration, maps stored in cardboard envelope at rear of each volume. Volume 1 has minimal penciled marginalia, otherwise, volumes are clean and sturdy. Dust jackets are quite edgeworn.