"[The author] reveals the reasons why thousands of Irish Catholics-- the most despised immigrant group in America at the time-- rallied to the Union cause and proved themselves to be among the most ferocious fighters of the war. He examines the character of the Irish Brigade's two most popular commanders, Michael Corcoran, a man of unshakable principles, and Thomas Francis Meagher, a complex man with many fine qualities-- and almost as many flaws.

Remembering Ireland and fighting for the Union : the origins of the Irish Brigade -- Sons of Erin : the commanders of the Irish Brigade -- Like a rock in a whirlpool : the Irish Brigade at Bull Run -- On to Richmond : the Irish Brigade during the Peninsula Campaign -- "We shall give them a few more volleys, boys, and then the bayonet!" : the Irish Brigade at Antietam -- The bloodiest day : the Irish Brigade at Fredericksburg -- "What will the country cay?" : the Irish Brigade at Chancellorsville -- The turning point : the Irish Brigade at Gettysburg -- The wall of fire : the Irish Brigade at the Battle of the Wilderness -- "Hold on with a bulldog grip" : the Irish Brigade at the Siege of Petersburg -- "Here is what is left of us" : the Irish Brigade at Appomattox -- Epilogue: The legacy of the Irish Brigade.