With an army of 15,000 men, Ulysses S. Grant sets out from Cairo, Illinois, in an effort to end Kentucky's bid to remain neutral in the Civil War. Seizing Fort(s) Henry and Donelson, he next launches an even more ambitious campaign deep into Tennessee, where a large Confederate force under Albert Sidney Johnston awaits. The ensuing confrontation will be referred to by General William T. Sherman as "The devil's own day."