for protection against the Pequots, Wampanoags, Mohegans, and the New Netherland Colony. After Springfield broke ties with the Colony, the remaining Connecticut settlements demanded that Springfield's ships pay tolls when passing the mouth of the river. The ships refused to pay this tax without representation at Connecticut's fort, but Hartford refused to grant it. In response, the Massachusetts Bay Colony solidified its friendship with Springfield by levying a toll on Connecticut Colony ships entering Boston Harbor. Connecticut was largely dependent on sea trade with Boston and therefore permanently dropped its tax on Springfield, but Springfield allied with Boston nonetheless, drawing the first state border across the Connecticut River. The Fort at Number 4 in Charlestown, New Hampshire, was the northernmost British colonial presence on the Connecticut River until the end of the French and Indian War in 1763. The Abenaki had resisted British colonial settlement for decades, but colonists began settling north of Brattleboro, Vermont, following the war. Settlement of the Upper Connecticut River Valley increased quickly, with population assessments of 36,000 by 1790. Vermont was claimed by both New Hampshire and New York, and was settled primarily through the issuance of land grants by New Hampshire Governor Benning Wentworth beginning in the 1740s. New York protested these grants, and King George III decided in 1764 that the border between the provinces should be the western bank of the Connecticut River. Ethan Allen, the Green Mountain Boys, and other residents of the disputed area resisted attempts by New York to exercise authority there, which resulted in the establishment of the independent Vermont Republic in 1777 and its eventual accession to the United States in 1791 as the fourteenth state. Boundary disputes between Vermont and New Hampshire lasted for nearly 150 years and were finally settled in 1933, when the U.S. Supreme Court reaffirmed King George's boundary as the ordinary low-water mark on the Vermont shore. In some places, the state line is now inundated by the impoundments of dams built after this time. The Treaty of Paris and the 19th century The Treaty of Paris (1783) that ended the American Revolutionary War created a new international border between New Hampshire and the Province of Canada at "northwesternmost headwaters of the Connecticut". Several streams fit this description, and thus a boundary dispute led to the short-lived Indian Stream Republic, which existed from 1832 to 1835. The broad, fertile Connecticut River Valley