Drawing on often overlooked sources, this study sheds new light on the fighting done by Hilliard's Legion--a part of Archibald Gracie's Brigade of Alabama Confederates--at the battle of Chicamauga. The author shows conclusively that Gracie's command was never forced from the berm at the top of the Horseshoe Ridge and that some men from Hilliard's Legion penetrated to the top of the Ridge. A reexamination of the battle's conclusion highlights the Legion's role in the final movement. A Medal of Honor citation is corrected and the Legion's post-war contributions are explored. A complete roster is included, with biographical notes on most of the soldiers.