In order to settle the New England region, you need the game pieces and cards from the Catan base game.
You also need additional markers for victory point tokens; you can use Catan chits from the Seafarers expansion, coins, or whatever else is handy. The standard Catan base game rules apply to this scenario, with certain exceptions.
New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut. New England is bordered by the Atlantic Ocean, Canada (the Canadian Maritimes and Quebec) and the state of New York. The earliest known inhabitants of the region were a variety of tribes who spoke various dialects of the Eastern Algonquian languages. These included the Abenaki, Penobscot, Pequot, Mohegans, Pocumtuck, and Wampanoag. The Connecticut River Valley, which includes parts of Vermont, New Hampshire, Massachusetts and Connecticut, linked these different indigenous communities culturally, linguistically, and politically.
In the early 17th century, French, Dutch, and English traders, exploring the New World, would trade metal, glass, and cloth to the indigenous peoples for local beaver pelts. Some small settlements (trading outposts really) were started, but most quickly failed. It wasn’t until the arrival of the Mayflower in 1620, that the first European settlements finally took root. Within a few short decades several colonies were formed–including the Plymouth, Massachusetts Bay, New Haven and Connecticut colonies. These colonies formed a loose organizational agreement called the New England Confederation.
By the late 18th century, the New England Colonies began protest England’s efforts to impose new taxes without the consent of the colonists. The Boston Tea Party (1773) was one such protest which so angered Great Britain, it stripped the colonies of self-government. This led to open revolt and warfare within the colonies in 1775, the expulsion of the British from New England in spring 1776, and the Declaration of Independence in July 1776.