In 1638, Cassacinamon became a servant in the home of John Winthrop[1][2] in Boston where he learned English.
He served as a translator, and he helped the Pequots to request to be under colonial authority rather than under Uncas.
By the late 1640s Cassacinamon was with John Winthrop, Jr. in what is now New London.
[3] By 1655, the United Colonies appointed Cassacinamon to be governor of the Pequots in settlements at Nameaug (New London, Connecticut) and Noank.
[4][5] He used his negotiation skills to secure the return of some tribal lands, resulting in the establishment of an approximately 3,000-acre reservation in 1665-1666.