Narragansett Bay
In 1663, Rhode Island obtained a patent extending its territory in certain places three miles east of Narragansett Bay. In 1664, a royal commission appointed by King Charles II of England denied the claims of Massachusetts and Plymouth to land west of Narragansett Bay, granting jurisdiction to the newly unified Colony of Rhode Island and Providence Plantations (pending resolution of the claims of Connecticut). However, the claims of Plymouth to all lands east of Narragansett Bay were upheld, and so the border was set in practice.