Three full days of Gettysburg at a small-unit level including counters for individual leaders and horses. Many short scenarios are available but its appeal is the 125-turn 60+-hour full game. Inspiration for the Great Battles of the American Civil War series of games.The name Terrible Swift Sword is taken from the Civil War era song 'Battle Hymn of the Republic,' which has in its opening lines 'He hath loosed the fateful lightning of his terrible swift sword.' - BoardGameGeek