Thanksgiving dates back to 1621, with a party held at Plymouth Plantation, where the first residents from England settled in the United States. They invited the Wampanoag to the party to celebrate a successful growing season. This year, the ceremony took place on November 26. The history of turkey at Thanksgiving hasn’t been clarified. No one knows exactly why this species was chosen as a traditional dish, but historians have several theories. From early colonial letters to early America, the historic meal between the founders and the Wampanoag tribe had beef and a chicken. Later, that meal became known as the first Thanksgiving.