The Arab mare, Traveller, the stallion of General Lee and even Nellie, his chicken... The animals have the beautiful part in this sixty-second adventure of the Blue Tunics! Whether they are on the battlefield or accompany the soldiers in their daily lives, the animals have indeed been of decisive importance at times during the conflicts. The bitch Sallie, heroine of this story, is indeed the exclaiming example. While reinforcements of the 11th infantry regiment are sent from Pennsylvania to lend a hand to the camp of our two heroes, faced with the threat of an imminent confrontation, the commanders entrust Chesterfield with a mission as risky as it is capital: the capture of an enemy in order to extract information. An operation that Sallie decides to follow by accompanying the sergeant, because the result of this mission is mainly the life of several thousand soldiers...