Of these settlements, Hartford and Springfield quickly emerged as powers. In 1641, Springfield splintered off from the Hartford-based Connecticut Colony, allying itself with the Massachusetts Bay Colony. For decades, Springfield remained the Massachusetts Bay Colony's westernmost settlement, on the northern border of the Connecticut Colony. By 1654, however, the success of these English settlements rendered the Dutch position untenable on the Connecticut River. A treaty moved the boundary westward between the Connecticut Colony and New Netherland Colony to a point near Greenwich, Connecticut. The treaty allowed the Dutch to maintain their trading post at Fort Huys de Hoop, which they did until the 1664 British takeover of New Netherland.