This is a great reference book for anyone interested in US Army cap eagles. There are sections for officers, enlisted men and even WAC's. It covers eagles from WWII up to 1975 when the Institute of Heraldry standardized the design. Before that time there were many variations and most of them you will find in this book.You will also find ATC badges, Harbor Boat Service and Warrant Officers. Since there are no other books like it that cover this much material, it is a must for anyone interested in this subject.