They were Christians.
I'm sorry you couldn't read the website I suggested.
If you're asking about the native American religion --
"First, at the time of European contact, all but the simplest indigenous cultures in North America had developed coherent religious systems that included cosmologies—creation myths, transmitted orally from one generation to the next, which purported to explain how those societies had come into being.
Second, most native peoples worshiped an all-powerful, all-knowing Creator or “Master Spirit” (a being that assumed a variety of forms and both genders). They also venerated or placated a host of lesser supernatural entities, including an evil god who dealt out disaster, suffering, and death.
Third and finally, the members of most tribes believed in the immortality of the human soul and an afterlife, the main feature of which was the abundance of every good thing that made earthly life secure and pleasant."