Nolan, Alan T.: The Iron Brigade

This is the story of the most famous unit in the Union Army. Originally called the 'Black Hat Brigade' because soldiers wore the army's regular dress black hat instead of the more typical blue cap, the Iron Brigade was the only all-Western brigade in the Eastern armies of the Union. The Western soldiers earned and justified the proud name Iron Brigade. And when the war was over, the records showed that it led all Federal brigades in percentage of deaths in battle. The North might well have lost the battle of Gettysburg if not for the Iron Brigade's famous stand.