"The Long Patrol" is a historical fiction novel written by Albert M. Treynor. The book is set during the American Civil War and follows the story of a group of soldiers who are part of the Union Army's Army of Cumberland. The protagonist, Sergeant James Gannon, is a tough and experienced soldier who has been in many battles. He is tasked with leading a group of soldiers on a dangerous mission to spy on Confederate troops and gather intelligence about their plans. The mission is risky and requires the soldiers to endure long marches, harsh weather conditions, and the constant threat of enemy attacks. The book provides a detailed and engaging account of the daily lives of soldiers during the Civil War. The soldiers in the book are portrayed as ordinary men who are thrust into extraordinary circumstances and must rely on their training, leadership, and camaraderie to survive.