This book has information of all Massachusetts Civil War Regiment were organized in the state. This is a research base book to find the information about one or more of the Massachusetts Regiments all in one place. The information is: who the commanding officers were are the organization (mustering in) of the regiment; what battles the regiment was involved in; the armies the regiment belonged to; total enrolled and break down of causalities; and when and where the regiment was organized and mustered out.