Who were the first American groups?

The first American groups were primarily Indigenous peoples, including diverse tribes and nations such as the Sioux, Navajo, Iroquois, and many others, who inhabited the continent long before European contact. Following their arrival in the late 15th century, European settlers formed groups like the Puritans, Pilgrims, and various colonial assemblies. These early settlers established communities that would eventually evolve into the United States, contributing to the complex tapestry of American society.