In March 1621, when Plymouth’s survival was hanging in the balance, the Wampanoag sachem (or chief), Ousamequin (Massasoit), and Plymouth’s governor, John Carver, declared their people’s friendship for each other and a commitment to mutual defense. Later that autumn, the English gathered their first successful harvest and lifted the specter of starvation. Ousamequin and 90 of his men then visited Plymouth for the “First Thanksgiving.” The treaty remained operative until King Philip’s War in 1675, when 50 years of uneasy peace between the two parties would come to an end. Four hundred years after that famous meal, historian David J. Silverman sheds profound new light on the events that led to the creation, and bloody dissolution, of this alliance.