This military history covers the attempts of General Wladyslaw Sikorski and his successor (General Kazimierz Sosnkowski) to integrate Polish forces into Western strategy, and to have their clandestine forces declared an allied combatant. It addresses such topics as Poland's part in the Norwegian and French campaigns, the Battle of Britain, Polish intelligence services, Polish radio communications, the Polish Parachute Brigade, the German invasion of the Soviet Union, the Bomber Offensive, the Katyn graves, Polish air crews in the RAF Transport Command, the Tehran Conference, Polish Wings in the 2nd Tactical Air Force, the Bardsea Plan, the invasion of Normandy, the Pierwsza Pancera, the Warsaw Uprising, Operation Freston, the disbanding of the Polish Home Army, and the Yalta Conference.