They All Played a Part. (Squanto)

In 1621, Massasoit, the Wampanoag leader, sent Squanto to meet with the English settlers at the Plymouth colony because he could speak better English then Samoset and he knew the land well. Squanto was a Patuxet man who assisted the Pilgrims following their first winter in the New World in 1620. He befriended the English settlers and spent over a year with the Pilgrims, teaching them about local resources, fishing and how to cultivate and farm the land. Because Squanto spoke better English than Samoset, he negotiated a peace treated with the Pilgrims. It is out of this friendship that the story of Thanksgiving has come, with Squanto convincing Massasoit  to join the Pilgrims for a historic meal and agreement. In 1622, Squanto died from Indian fever while on a fishing expedition with a neighboring tribe.

Sources:

http://www.socialstudiesforkids.com/articles/ushistory/squanto.htm

http://www.mahalo.com/squanto/