This book is the ninth in a 10 volume set describing the concise history of the units of the Royal Australian Air Force between 1921 and 1996. It was was published and launched as part of the RAAF's 75th birthday in 1996.
Volume 9, Ancillary Units, is designed to acknowledge the role and functions of units which could not be categorised in one or other of the functional areas. They are of no less importance, and many units had, or have, a proud record of service. The inclusion of so many units which perform such different functions demonstrates, as no other volume in this collection, the breadth and variety of RAAF activity. The expertise of the Airfield Construction Squadrons was essential for flying units to advance in the Pacific; 201 Flight explored the (then) technological frontiers of aerial electronic surveillance; and the humanitarian efforts of medical staff are valued by all members of the RAAF.