Question: Why was the battle of the capital of the county having Borough of Princeton important to the American revolution?

full_context: Document 1: Battle of Trenton: The Battle of Trenton was a small but pivotal battle during the American Revolutionary War which took place on the morning of December 26, 1776, in Trenton, New Jersey. After General George Washington's crossing of the Delaware River north of Trenton the previous night, Washington led the main body of the Continental Army against Hessian mercenaries garrisoned at Trenton. After a brief battle, almost two - thirds of the Hessian force was captured, with negligible losses to the Americans. The battle significantly boosted the Continental Army's flagging morale, and inspired re-enlistments.
Document 2: Princeton, New Jersey: Princeton is a municipality with a borough form of government in Mercer County, New Jersey, United States, that was established in its current form on January 1, 2013, through the consolidation of the Borough of Princeton and Princeton Township. As of the 2010 United States Census, the municipality's population was 28,572, reflecting the former township's population of 16,265, along with the 12,307 in the former borough.
Document 3: American Revolutionary War: British attempts to disarm the Massachusetts militia at Concord in April 1775 led to open combat. Militia forces then besieged Boston, forcing a British evacuation in March 1776, and Congress appointed George Washington to command the Continental Army. Concurrently, an American attempt to invade Quebec and raise rebellion against the British failed decisively. On July 2, 1776, the Continental Congress voted for independence, issuing its declaration on July 4. Sir William Howe launched a British counter-offensive, capturing New York City and leaving American morale at a low ebb. However, victories at Trenton and Princeton restored American confidence. In 1777, the British launched an invasion from Quebec under John Burgoyne, intending to isolate the New England Colonies. Instead of assisting this effort, Howe took his army on a separate campaign against Philadelphia, and Burgoyne was decisively defeated at Saratoga in October 1777.
Document 4: Battle of Princeton: The Battle of Princeton was a battle of the American Revolutionary War, fought near Princeton, New Jersey on January 3, 1777. Lieutenant General Charles Cornwallis had left 1,400 British troops under the command of Lieutenant Colonel Charles Mawhood in Princeton. Following a surprise attack at Trenton early in the morning of December 26, 1776, General George Washington of the Continental Army decided to attack the British in New Jersey before entering winter quarters. On December 30, he crossed the Delaware River back into New Jersey. His troops followed on January 3, 1777. Washington advanced to Princeton by a back road, where he pushed back a smaller British force but had to retreat before Cornwallis arrived with reinforcements. The battles of Trenton and Princeton were a boost to the morale of the Continental troops, leading many recruits to join the Continental Army in the spring.
Document 5: 15th Legislative District (New Jersey): New Jersey's 15th Legislative District is one of 40 in the New Jersey Legislature, covering the Hunterdon County municipalities of East Amwell Township, Lambertville City and West Amwell Township; and the Mercer County municipalities of Ewing Township, Hopewell Borough, Hopewell Township, Lawrence Township, Pennington Borough, Trenton City and West Windsor Township.
Document 6: The Bronx: The consolidation of the Bronx into New York City proceeded in two stages. In 1873, the state legislature annexed Kingsbridge, West Farms and Morrisania to New York, effective in 1874; the three towns were abolished in the process. In 1895, three years before New York's consolidation with Brooklyn, Queens and Staten Island, the whole of the territory east of the Bronx River, including the Town of Westchester (which had voted in 1894 against consolidation) and portions of Eastchester and Pelham, were annexed to the city. City Island, a nautical community, voted to join the city in 1896.
Document 7: 8th Legislative District (New Jersey): New Jersey's 8th Legislative District is one of 40 in the New Jersey Legislature, covering the Atlantic County municipality of Hammonton; the Burlington County municipalities of Eastampton Township, Evesham Township, Hainesport Township, Lumberton Township, Mansfield Township, Medford Township, Medford Lakes Borough, Mount Holly Township, Pemberton Borough, Pemberton Township, Shamong Township, Southampton Township, Springfield Township, Westampton Township and Woodland Township; and the Camden County municipalities of Berlin Borough, Pine Hill Borough, Pine Valley Borough and Waterford Township as of the 2011 apportionment.
Document 8: Battle of Trenton: The Battle of Trenton was a small but pivotal battle during the American Revolutionary War which took place on the morning of December 26, 1776, in Trenton, New Jersey. After General George Washington's crossing of the Delaware River north of Trenton the previous night, Washington led the main body of the Continental Army against Hessian soldiers garrisoned at Trenton. After a brief battle, nearly the entire Hessian force was captured, with negligible losses to the Americans. The battle significantly boosted the Continental Army's flagging morale, and inspired re-enlistments.
Document 9: The Death of General Mercer at the Battle of Princeton, January 3, 1777: The Death of General Mercer at the Battle of Princeton, January 3, 1777 is the title of an oil painting by the American artist John Trumbull depicting the death of the American General Hugh Mercer at the Battle of Princeton on January 3, 1777 during the American Revolutionary War. The painting was Trumbull’s first depiction of an American victory. It is one of a series of historical paintings on the war, which also includes the "Declaration of Independence" and "The Capture of the Hessians at Trenton, December 26, 1776".
Document 10: The Bronx: The territory now contained within Bronx County was originally part of Westchester County, one of the 12 original counties of the English Province of New York. The present Bronx County was contained in the town of Westchester and parts of the towns of Yonkers, Eastchester, and Pelham. In 1846, a new town, West Farms, was created by division of Westchester; in turn, in 1855, the town of Morrisania was created from West Farms. In 1873, the town of Kingsbridge (roughly corresponding to the modern Bronx neighborhoods of Kingsbridge, Riverdale, and Woodlawn) was established within the former borders of Yonkers.
Document 11: Borough of Princeton, New Jersey: The Borough of Princeton was incorporated by an act of the New Jersey Legislature on February 11, 1813, within portions of West Windsor Township (in what was then part of Middlesex County) and Montgomery Township (in Somerset County), and was reincorporated on November 27, 1822. The borough became part of the newly created Mercer County in 1838, and became a fully independent municipality circa 1894. Portions of territory were acquired from Princeton Township on January 4, 1928 and August 21, 1951. On November 8, 2011, voters in Princeton Borough voted to consolidate with Princeton Township.
Document 12: Hunterdon Central Regional High School: Hunterdon Central Regional High School is a comprehensive, four-year public high school, and regional school district that serves students from five municipalities in east central Hunterdon County, New Jersey, United States. Students hail from Delaware Township, East Amwell Township, Flemington, Raritan Township and Readington Township.
Document 13: 2nd Legislative District (New Jersey): New Jersey's 2nd Legislative District is one of 40 in the state, covering the Atlantic County municipalities of Absecon City, Atlantic City, Brigantine City, Buena Borough, Buena Vista Township Egg Harbor City, Egg Harbor Township, Folsom Borough, Hamilton Township, Linwood City, Longport Borough, Margate City, Mullica Township, Northfield City, Pleasantville City, Somers Point City and Ventnor City as of the 2011 apportionment. Except for an eight-year period from 1974 until 1982, the 2nd District is exclusively made up of municipalities from Atlantic County since 1967.
Document 14: 6th Legislative District (New Jersey): New Jersey's 6th Legislative District is one of 40 in the New Jersey Legislature, covering the Burlington County municipality of Maple Shade Township and the Camden County municipalities of Berlin Township, Cherry Hill Township, Collingswood Borough, Gibbsboro Borough, Haddon Township, Haddonfield Borough, Hi-Nella Borough, Merchantville Borough, Oaklyn Borough, Pennsauken Township, Somerdale Borough, Stratford Borough, Tavistock Borough and Voorhees Township as of the 2011 apportionment.
Document 15: East Jersey: The Province of East Jersey, along with the Province of West Jersey, between 1674 and 1702 in accordance with the Quintipartite Deed were two distinct political divisions of the Province of New Jersey, which became the U.S. state of New Jersey. The two provinces were amalgamated in 1702. East Jersey's capital was located at Perth Amboy. Determination of an exact location for a border between West Jersey and East Jersey was often a matter of dispute.
ground_truth: significantly boosted the Continental Army's flagging morale, and inspired re-enlistments
sub_queries: Borough of Princeton >> located in the administrative territorial entity Answer: Mercer County
Mercer County >> capital Answer: Trenton
why was the battle of Trenton important to the american revolution Answer: significantly boosted the Continental Army's flagging morale, and inspired re-enlistments