The book is very easy to follow as it begins with the creation of every regiment in the brigade and ends months after Appomattox.

By using primary accounts and concise analysis, Nolan covers the relationships between the ordinary men and their officers, the relationships between the regiments, the relationships between the brigades and divisional/corps commanders all the way up to McClellan/Hooker and more. In addition, the politics in the brigade and the Army of the Potomac as a whole are covered, and all of this without even getting into the combat history of the brigade.

Nolan covers in depth every combat the Iron Brigade was engaged in while it consisted of just Westerners, and the Epilogue in the book deals with the addition of non Western units to the Brigade, the dissolution of some of the regiments and the mustering out of notable officers through discharges, wounds and death.

In Nolan's interpretation, although it keeps its name, the Iron Brigade is no longer THE Iron Brigade after all the casualties at Gettysburg and the addition of Eastern troops to the brigade on July 18, 1863. Thus the combat from Brawner's Farm to Gettysburg is covered in depth concerning the brigade's actions. The book has exceptional maps for the actions of the brigade on the battlefields and casualty counts for every regiment. The chapter dealing with Day 1 of Gettysburg is the book's most poignant and gripping battle account.

The notes in the book are nearly 100 pages and are nearly as interesting as the narrative itself. In the notes are extended discussions on casualty %s (the Iron Brigade as a whole suffered the most battle casualties by % than any Federal brigade during the war, the 2nd Wisconsin suffered the most by % of any regiment, the 24th Michigan suffered 80% casualties on July 1 etc.) and Nolan's explanation in how he dealt with discrepancies in battle records and accounts. In the epilogue's notes, Nolan offers up post-war details of the officers in the 5 regiments.

One of the best parts of the book is how Nolan really takes issue with Glenn Turner's book on Gettysburg due to its pro-Confederate slant. Turner claims the Iron Brigade was "swept off" the field and calls Old Man Burns, the old citizen who came onto the field and fought with the Iron Brigade, a "cowardly" "bushwhacker" despite fighting in line and being wounded three times during the battle.

This book is perfect for anyone interested in the Civil War or anyone interested in the military history of Wisconsin, Indiana and Michigan.