New England Confederation

The United Colonies of New England, commonly known as the New England Confederation, was a confederal alliance of the New England colonies of Massachusetts Bay, Plymouth, Saybrook (Connecticut), and New Haven formed in May 1643, during the English Civil War. Its primary purpose was to unite the Puritan colonies in support of the Congregational church, and for defense against the Native Americans and the Dutch colony of New Netherland.

Source: Wikipedia — New England Confederation (CC BY-SA 4.0)