This book is the fifth volume in a series documenting the colonels of the Civil War Union army who did not advance beyond that rank. Presented in this volume are the colonels who commanded regiments from Indiana, Kentucky and Tennessee. A brief biographical sketch of each is included, providing a synopsis of each one's Civil War service followed by pertinent details of their life history.

Accompanying the biographical sketches are photographs of most of the colonels. Preceding the biographical sketches for each state is a roster of that state's colonels, in regimental order, including those promoted to brigadier general and brevet brigadier general, whose lives are documented in other reference works. A bibliography of reference sources allows for examination of the lives of the colonels in more detail. The work is fully indexed.