The original 1983 manuscript written by Eugene Alvarez, who is the primary author of this book, included the years 15621983. The current and revised manuscript was edited and updated by Leo J. Daugherty III, PhD, in cooperation with the primary author, and covers the years 1997 to 2015, including chapter 6, dealing with recruit training in the 1920s and 1930s, which was a part of his doctoral dissertation at the Ohio State University.
Since this work was first completed, Parris Island has undergone numerous changes in buildings, the base layout, and recruit training. The training philosophy has been altered as society demands. Thus, past training situations and methods should be observed as recorded in the chronological approach of the text to present times.