In 1637, hostilities broke out between English settlers in the Connecticut Valley and which local Native American tribe?

Pequot indians

Explanation:

In 1637, hostilities broke out between English settlers in the Connecticut valley and the Pequot Indians of the region, resulting with many of the natives being wiped out.

The Pequot War was an armed conflict that took place between 1636 and 1638 in New England between the Pequot tribe and an alliance of the colonists of the Massachusetts Bay, Plymouth, and Saybrook colonies and their allies. The war concluded with the defeat of the Pequots. At the end, more than 600 Pequots had been killed or taken into captivity. Hundreds of prisoners were sold into slavery to the West Indies, other survivors were dispersed as captives to the victorious tribes.

The pequots where eliminated and the colonial authorities declared them extinct. Survivors had be integrated into other local tribes.