Includes 6 maps and over 20 other illustrationsThe German attack on Poland precipitated World War II, making the Polish campaign one of particular significance to the student of the 1939-45 conflict. The lessons learned by the German Army in its operations in Poland were put to use in the later campaigns against the western Allies, the Balkan states, and the Soviet Union. Poland also formed the testing ground for new theories on the use of armored forces and close air support of ground troops. The complete destruction of the Polish state and the removal of Poland from the map of eastern Europe were grim portents of the fate of the vanquished in the new concept of total war. The purpose of this campaign study is to provide the United States Army with a factual account of German military operations against Poland, based on source material from captured records currently in the custody of The Adjutant General, Department of the Army; monographs prepared by a number of former German officers for the Historical Division, United States Army, Europe; and such Polish accounts as were available.