the province experienced after unsuccessfully invading Canada in 1760. Even though New York City merchants lost out on lucrative military contracts, the group sought common ground between the King and the people; however, compromise became impossible as of April 1775 Battles of Lexington and Concord. In that aftermath the New York Provincial Congress on June 9, 1775 for five pounds sterling for each hundredweight of gunpowder delivered to each county's committee. Two powerful families had for decades assembled colony-wide coalitions of supporters. With few exceptions, members long associated with the DeLancey faction went along when its leadership decided to support the crown, while members of the Livingston faction became Patriots. New York's strategic central location and port made it key to controlling the colonies. The British assembled the century's largest fleet: at one point 30,000 British sailors and soldiers anchored off Staten Island. General George Washington barely escaped New York City with his army in November 1776; General Sir William Howe was successful in driving Washington out, but erred by expanding into New Jersey. By January 1777, he retained only a few outposts near New York City. The British held the city for the duration, using it as a base for expeditions against other targets. In October 1777, American General Horatio Gates won the Battle of Saratoga, later regarded as the war's turning point. Had Gates not held, the rebellion might well have broken down: losing Saratoga would have cost the entire Hudson–Champlain corridor, which would have separated New England from the rest of the colonies and split the future union. Statehood to the Civil War Upon war's end, New York's borders became well–defined: the counties east of Lake Champlain became Vermont and the state's western borders were settled by 1786. Many Iroquois supported the British (typically fearing future American ambitions). Many were killed during the war; others went into exile with the British. Those remaining lived on twelve reservations; by 1826 only eight reservations remained, all of which survived into the 21st century. The state adopted its constitution in April 1777, creating a strong executive and strict separation of powers. It strongly influenced the federal constitution a decade later. Debate over the federal constitution in 1787 led to formation of the groups known as Federalists—mainly "downstaters" (those who lived in or near New York City) who supported a strong national government—and Antifederalists—mainly upstaters (those who lived to the city's