Around this time every year, Americans come together to share a feast commemorating a myth about its first inhabitants.

An indigenous tribe did eat with the Pilgrims in 1621 and sign a treaty with the colonists that had settled on their shores -- an act of survival rather one of goodwill and friendship. But the relationship would eventually break down, decimating the tribe's population and whittling away its land.

Nearly 400 years later, the descendants of the very tribe at the heart of the Thanksgiving holiday are still fighting to reclaim their lands -- a fight that ironically hinges on whether or not the tribe meets the federal government's definition of "Indian."

"We're kind of stereotyped as the tribes that met the Pilgrims and that's our whole history, like we ceased to exist in 1621," said Robert Maxim, a citizen of the Mashpee Wampanoag tribe. "That couldn't be further from the truth."