Fort Heiman, part of Fort Donelson National Battlefield, was a small, irregular earthen fortification built atop Stewart's Hill on the Kentucky side of the Tennessee River to provide artillery support for flood-prone Fort Henry. Named for Confederate Col. Adolphus Heiman, who commanded its 1,000-man garrison, it was begun in January 1862 using mostly slave labor from Alabama and Mississippi, but it remained unfinished when Union Gen. Ulysses S. Grant launched his amphibious campaign in early February 1862. Its garrison, composed of men from Alabama, Mississippi, Florida, Tennessee, and Kentucky, was withdrawn on February 4 before Union gunboats attacked Fort Henry. Remnants of Fort Heiman's entrenchments still survive, along with remains of a later fort built and occupied by Union forces.