“Fighting Poland 1939–1945,” Volumes 1–2: “The Battle: The Foundation” by Jerzy Ślaski is a publication released by the PAX Publishing Institute in 1985. The book is 441 pages long and describes the origins of the Polish Underground State and the development of the armed resistance movement from 1939 to 1945. The author discusses the activities of independence organizations, the formation of the Home Army, and the most important events and military operations that formed the foundation of the struggle to regain independence, including preparations for the Warsaw Uprising.