Thanksgiving (United States) The most prominent historic thanksgiving event in American popular culture is the 1621 celebration at the Plymouth Plantation, where the settlers held a harvest feast after a successful growing season. Autumn or early winter feasts continued sporadically in later years, first as an impromptu religious observance and later as a civil tradition. The Plymouth settlers, known as Pilgrims, had settled in land abandoned when all but one of the Patuxet Indians died in a plague. After a harsh winter killed half of the Plymouth settlers, the last surviving Patuxet, Squanto (who had learned English and avoided the plague as a
Pilgrims (Plymouth Colony) how weakened the settlement had actually become. Between the landing and March, only 47 colonists had survived the diseases that they contracted on the ship. During the worst of the sickness, only six or seven of the group were able to feed and care for the rest. In this time, half the "Mayflower" crew also died. William Bradford became governor in 1621 upon the death of John Carver. On March 22, 1621, the Pilgrims of Plymouth Colony signed a peace treaty with Massasoit of the Wampanoags. The patent of Plymouth Colony was surrendered by Bradford to the freemen in 1640,