Letter from Captain Aden Cavins, Company E, 59th Indiana Volunteer Infantry, to his wife.
Federals score their greatest victory of the war up to this time, generating a new national hero in the process.
The Confederate try breakout out of the Federal grip around Fort Donelson before deciding on whether or not to surrender.
Federal army and navy forces attack Fort Donelson on the Cumberland River, but they find the defenses much stronger than Fort Henry.
Ulysses S. Grant plans to follow up the victory at Fort Henry by capturing a much stronger Confederate fort in Tennessee.