This book is a detailed look at how the Artillery Air Section of a US Army Headquarters functioned during the Second World War in Europe. It relates how its Air Observation Post aircraft were procured, crewed and operated, as recorded by the officer responsible for such matters. In this instance the HQ was that of Ninth US Army, and the officer concerned was the late Lt Col Robert M Leich. As Artillery Air Officer, Leich maintained a Daily Journal, and this is the principal source on which this book is based. The result is a book of a different kind, covering both operational and administrative matters. Also revealed is the close co-operation that existed between Ninth Army and the two USAAF 'air' units attached to it, namely the 125th Liaison Squadron and the 50th Mobile Reclamation and Repair Squadron.

This collection of squadron histories has been prepared by the USAF Historical Division to complement the Division's book, Air Force Combat Units of World War II. The 1,226 units covered by this volume are the combat (tactical) squadrons that were active between 7 December 1941 and 2 September 1945. Each squadron is traced from its beginning through 5 March 1963, the fiftieth anniversary of the organization of the 1st Aero (later Bombardment) Squadron, the first Army unit to be equipped with aircraft for tactical operations. For each squadron there is a statement of the official lineage and data on the unit's assignments, stations, aircraft and missiles, operations, service streamers, campaign participation, decorations, and emblem.