 In 1637, English Puritan colonists destroyed a principal fortified village at Mistick with the help of Uncas, Wequash, and the Narragansetts during the Pequot War.This ended with the death of Uncas' cousin Sassacus at the hands of the Mohawk, an Iroquois Confederacy nation from west of the Hudson River.Thereafter, the Mohegan became a separate tribal nation under the leadership of their "sachem" Uncas.