1741–1801

Benedict Arnold

New Haven MerchantContinental Army OfficerMilitia Captain

Events in New Haven

Biography

Benedict Arnold (1741–1801)

Merchant, Soldier, Traitor: The Most Complicated Man of the Revolution

Few figures in American history carry as much contradictory weight as the man born on January 14, 1741, in Norwich, Connecticut. Benedict Arnold grew up in a family that had once enjoyed comfortable prosperity but suffered devastating reversals. His father, a merchant, descended into alcoholism as business failures and the deaths of several children hollowed out the family's standing. Young Benedict witnessed firsthand how quickly respectability could collapse, and the experience left him with an almost feral hunger for recognition and status. His mother, Hannah Waterman King Arnold, managed to secure him an apprenticeship with her cousins Daniel and Joshua Lathrop, prominent apothecaries and merchants in Norwich. Under their guidance, Arnold learned the pharmaceutical trade and the rhythms of Atlantic commerce. He also served briefly during the French and Indian War, enlisting as a teenager before returning to complete his apprenticeship. These early years forged the essential qualities that would define his Revolutionary career — physical courage, commercial ambition, acute sensitivity to personal honor, and a restless impatience with anyone who stood in his way. By the time he left Norwich for New Haven, he was already a young man in a hurry, determined to build something that could never be taken from him.

Arnold arrived in New Haven as a young man and set about constructing exactly the life his family had lost. He established himself as an apothecary and merchant, opening a shop on Chapel Street and rapidly expanding into maritime trade with the Caribbean and ports along the Atlantic seaboard. He owned several ships, dealt in goods ranging from rum and sugar to books and medicines, and cultivated the connections necessary for commercial success in a colonial port town. By the early 1770s, he was one of New Haven's most prominent businessmen, a man of visible wealth who had married Margaret Mansfield, the daughter of a local sheriff. He was elected captain of the Governor's Second Company of Foot Guard, a militia unit that doubled as a social organization for the town's ambitious men. Yet Arnold's mercantile success also brought him into repeated, grinding conflict with British customs enforcement and the trade restrictions imposed by Parliament. He experienced imperial policy not as an abstraction but as a direct assault on his livelihood and dignity. When the political crisis between the colonies and Britain intensified in the mid-1770s, Arnold's resentments were deeply personal. He had built his fortune through enterprise and risk, and he saw British regulation as an affront to everything he had earned.

The moment that launched Arnold's military career came with explosive clarity in late April 1775, when riders brought news of Lexington and Concord to New Haven. Arnold did not wait for the town's political leadership to debate the proper response. He assembled his company of the Governor's Foot Guard and demanded that the selectmen hand over the keys to the town's powder magazine so he could arm his men for the march to Cambridge. When the selectmen hesitated, reluctant to authorize what amounted to an act of open rebellion, Arnold reportedly told them he would break down the door if the keys were not forthcoming. The selectmen relented. Within days, Arnold and his militia company were marching toward Massachusetts to join the patriot forces gathering around Boston. This confrontation at the powder house was characteristic of Arnold at his most effective — bold, impatient, unwilling to let caution or bureaucratic timidity slow him down. His arrival in Cambridge placed him at the center of the revolutionary movement at its earliest and most uncertain stage. Almost immediately, he began proposing offensive operations, arguing that the poorly defended British post at Fort Ticonderoga on Lake Champlain could be seized, giving the patriots both a strategic advantage and a desperately needed supply of artillery.

Arnold's proposal to capture Fort Ticonderoga earned him a colonel's commission from the Massachusetts Committee of Safety, and in May 1775 he raced north to lead the expedition. The operation was complicated by the simultaneous arrival of Ethan Allen and his Green Mountain Boys, who had their own designs on the fort. The two headstrong leaders clashed over command but ultimately cooperated enough to seize Ticonderoga on May 10, 1775, in a swift dawn raid that captured the garrison without a fight. Later that year, Arnold undertook one of the war's most grueling operations: leading an expedition of roughly eleven hundred men through the Maine wilderness to attack Quebec City. The march was a nightmare of swamps, freezing rivers, starvation, and desertion, but Arnold drove his dwindling force forward with relentless determination. The assault on Quebec on December 31, 1775, failed — Arnold was shot through the leg early in the fighting — but the audacity of the attempt cemented his reputation as perhaps the most daring field commander in the Continental Army. The following year, at the Battle of Valcour Island on Lake Champlain in October 1776, Arnold commanded a hastily built fleet that delayed the British advance southward from Canada, buying critical time for the patriot cause.

Arnold's relationships with other Revolutionary leaders were defined by a volatile mixture of mutual admiration, jealousy, and institutional friction. George Washington recognized Arnold's extraordinary battlefield abilities and repeatedly supported his advancement, seeing in him a commander who could match British regulars in aggressiveness and tactical creativity. Yet Arnold's relationship with the Continental Congress was poisoned almost from the start. Congress passed him over for promotion in February 1777, elevating five junior brigadier generals to major general while leaving Arnold behind, an insult he never forgot and never fully forgave. His relationship with Ethan Allen during the Ticonderoga campaign foreshadowed a pattern: Arnold worked poorly with equals and bristled under any authority he considered illegitimate. His collaboration with General Horatio Gates during the Saratoga campaign of 1777 became openly hostile, with Gates stripping Arnold of his command in the midst of the fighting. Arnold's most important personal relationship during the war was arguably his second marriage, in 1779, to Peggy Shippen of Philadelphia, a young woman with loyalist connections and expensive tastes. Many historians believe Peggy played a significant role in Arnold's eventual decision to betray the patriot cause, though the precise nature of her influence remains debated.

The Saratoga campaign of September and October 1777 brought Arnold both his greatest glory and deepest grievance. Serving under Gates during the effort to stop General John Burgoyne's invasion from Canada, Arnold clashed repeatedly with his commanding officer over strategy and tactics. Gates, cautious and politically minded, sought to let the British exhaust themselves against fortified positions. Arnold argued for aggressive counterattacks. The tension escalated until Gates formally relieved Arnold of command. On October 7, 1777, during the second Battle of Bemis Heights, Arnold defied Gates's orders and rode onto the battlefield without authorization, rallying American troops and personally leading the decisive assault on the Breymann Redoubt. His charge broke the British defensive line and effectively sealed Burgoyne's fate. Arnold was shot in the same leg that had been wounded at Quebec, and the injury nearly cost him the limb. The battle was the turning point that led to Burgoyne's surrender on October 17, which in turn brought France into the war as an American ally. Arnold had delivered what many historians consider the single most consequential individual battlefield performance of the entire Revolution, yet he received little of the credit he believed he deserved.

The war changed Arnold profoundly, and the change was not for the better. The man who had marched out of New Haven in 1775 with fiery patriotism and personal ambition gradually became consumed by bitterness, financial anxiety, and a corrosive sense of being undervalued. His wounds left him physically diminished — the leg injured at Quebec and shattered again at Saratoga never healed properly, leaving him unable to command in the field with his former agility. Appointed military governor of Philadelphia in 1778 after the British evacuation, he lived extravagantly, courted Peggy Shippen, and quickly attracted accusations of corruption and profiteering. A court-martial in late 1779 found him guilty on two relatively minor charges and sentenced him to a reprimand from Washington, which the commander-in-chief delivered in the gentlest possible terms. But Arnold experienced even this mild censure as a profound humiliation. The accumulation of slights — the passed-over promotions, the congressional ingratitude, the court-martial, the mounting debts — created a man who felt the Revolution owed him far more than it had paid. By 1779, he had already opened secret negotiations with the British through Major John André, offering to sell his services and whatever strategic assets he could deliver.

Arnold's treason, consummated in the summer and fall of 1780, centered on his command of the fortifications at West Point, the critical American stronghold controlling the Hudson River. He had actively sought the appointment from Washington, who granted it as a favor to a wounded hero. Arnold then systematically weakened the post's defenses and prepared to hand it over to the British in exchange for twenty thousand pounds and a commission as a brigadier general in the Royal Army. The plot unraveled on September 23, 1780, when Major André was captured near Tarrytown, New York, carrying incriminating documents in his stockings. Arnold learned of André's capture barely in time to flee down the Hudson to the British warship HMS Vulture. André was hanged as a spy on October 2, 1780. Arnold received his commission and a reduced payment, and spent the remainder of the war leading British expeditions against American targets. In September 1781, he commanded the raid on New London and Groton, Connecticut, which resulted in the burning of much of New London and the massacre of the garrison at Fort Griswold — atrocities committed against communities in his own home state.

Arnold's contemporaries regarded him with a fury that bordered on the existential. His treason was not merely a military betrayal; it struck at the moral foundations of the Revolutionary cause. If the army's most brilliant field commander could sell out, then the entire edifice of patriotic virtue seemed fragile and suspect. Washington, who had personally championed Arnold, felt the betrayal keenly and approved André's execution without hesitation. The Continental Army staged elaborate public rituals of denunciation, burning Arnold in effigy and erasing his name from honor rolls. In Britain, Arnold was received coolly. King George III is said to have respected his military abilities, but British officers who had remained loyal to the Crown from the start looked upon a turncoat with suspicion regardless of his usefulness. After the war, Arnold attempted to rebuild his mercantile career, trading from Saint John, New Brunswick, and later from London, but success eluded him. He was dogged by lawsuits, failed ventures, and the distrust of people on both sides of the Atlantic. He died in London on June 14, 1801, at the age of sixty, largely forgotten in Britain and remembered in America principally as a synonym for treachery.

Students and visitors today should know Benedict Arnold's story because it resists the comfortable simplifications that often characterize popular understanding of the American Revolution. Arnold was not a villain who stumbled into heroism or a hero who experienced a sudden moral collapse. He was a deeply ambitious, extraordinarily talented, and profoundly flawed human being whose trajectory illuminates the Revolution's internal tensions — between merit and political patronage, between individual sacrifice and institutional recognition, between idealism and self-interest. His story forces us to grapple with uncomfortable questions: What do we owe people who serve a cause brilliantly but feel inadequately rewarded? How do personal grievances interact with political loyalty? The Revolution was not fought by saints, and Arnold's career reminds us that the line between patriot and traitor could be perilously thin. His connection to New Haven — where he built his fortune, confronted the selectmen, and launched his military career — grounds his story in a specific, visitable landscape, making the abstract drama of revolution concrete and immediate.

WHY BENEDICT ARNOLD MATTERS TO NEW HAVEN

Benedict Arnold's story begins not on the battlefield but on the streets of New Haven, where he built his merchant business, commanded the local militia, and made the dramatic decision to march toward war. His confrontation with the town's selectmen at the powder magazine in April 1775 — demanding the keys, threatening to break down the door — captures the explosive moment when debate gave way to action across colonial America. New Haven was the place where Arnold's ambition, courage, and impatience first found public expression, and understanding his rise there helps students see how the Revolution was driven by real individuals in real communities making irreversible choices. His eventual treason makes the New Haven chapter all the more poignant: the city that launched his career became one of the states he later attacked.

TIMELINE

1741: Born January 14 in Norwich, Connecticut
1762: Establishes apothecary and mercantile business in New Haven, Connecticut
1767: Marries Margaret Mansfield, daughter of a New Haven sheriff
1775: Confronts New Haven selectmen at powder magazine and marches militia to Cambridge (April)
1775: Co-leads capture of Fort Ticonderoga with Ethan Allen (May 10)
1775: Leads expedition through Maine wilderness to attack Quebec; wounded in assault (December 31)
1776: Commands American fleet at Battle of Valcour Island on Lake Champlain (October 11)
1777: Leads decisive assault at Battle of Bemis Heights (Saratoga); severely wounded (October 7)
1780: Plot to surrender West Point to the British is discovered; flees to British lines (September 25)
1781: Leads British raid on New London and Groton, Connecticut (September 6)
1801: Dies in London, England (June 14)

SOURCES

Martin, James Kirby. Benedict Arnold, Revolutionary Hero: An American Warrior Reconsidered. New York University Press, 1997.
Philbrick, Nathaniel. Valiant Ambition: George Washington, Benedict Arnold, and the Fate of the American Revolution. Viking, 2016.
Randall, Willard Sterne. Benedict Arnold: Patriot and Traitor. William Morrow and Company, 1990.
New Haven Museum. "Benedict Arnold in New Haven." https://www.newhavenmuseum.org
Library of Congress. "George Washington Papers: Correspondence regarding Benedict Arnold's Treason, 1780." https://www.loc.gov/collections/george-washington-papers/

In New Haven

Apr
1775
Arnold Leads New Haven Militia to Cambridge
Role: New Haven Merchant
# Arnold Leads New Haven Militia to Cambridge On the morning of April 21, 1775, a breathless express rider galloped into New Haven, Connecticut, carrying news that would transform the political crisis between Britain and her American colonies into open warfare. Two days earlier, on April 19, British regulars had marched out of Boston under orders to seize colonial military supplies stored at Concord, Massachusetts. At Lexington Green, shots were fired — the famous "shot heard round the world" — and by the end of that bloody day, running battles along the road back to Boston had left hundreds of casualties on both sides. The American Revolution had begun, and the news rippled outward from Massachusetts like a shockwave, reaching communities throughout New England and demanding an immediate response. In New Haven, that response came with particular force and urgency from Benedict Arnold, a thirty-four-year-old merchant who had built a prosperous trading business in the town. Arnold was no stranger to bold action. A man of considerable physical energy and ambition, he had already established himself as captain of a local militia company known as the Governor's Second Company of Guards. When word of Lexington and Concord reached his ears, Arnold wasted no time deliberating. He assembled his militia company and marched to the town's powder magazine to secure arms and ammunition for the journey north to Cambridge, where colonial forces were beginning to gather around the besieged British garrison in Boston. What happened next became one of the earliest dramatic confrontations of the Revolution — not between patriots and redcoats, but between patriots of differing temperaments. The town selectmen, cautious civic leaders who were not yet ready to commit New Haven's resources to what might prove a reckless rebellion, hesitated to hand over the keys to the powder house. Arnold, never a man inclined toward patience or deference to committees, delivered an ultimatum that left no room for negotiation. He reportedly told the selectmen plainly that he would break down the doors if the keys were not surrendered. Faced with Arnold's determination and the armed militiamen standing behind him, the selectmen relented. Arnold got his keys, his powder, and his musket balls, and he led his company out of New Haven on the road to Cambridge. Arnold's march to Cambridge was significant not merely as one of many militia responses to the crisis at Lexington and Concord but because of what it set in motion. Upon arriving in the vicinity of Boston, Arnold did not simply fold himself into the growing but disorganized army assembling around Cambridge. Instead, he brought with him a proposal that demonstrated genuine strategic vision. Arnold knew, from his experience as a merchant who had traded throughout the colonies, that Fort Ticonderoga on Lake Champlain held a substantial store of artillery — cannon that the colonial forces desperately lacked. He presented a plan to seize the fort, and colonial authorities commissioned him to carry it out. The subsequent expedition against Ticonderoga in May 1775, conducted alongside Ethan Allen and his Green Mountain Boys, succeeded in capturing the fort and its precious artillery. Those cannon would eventually be transported to Boston by Colonel Henry Knox in an extraordinary overland journey during the winter of 1775–1776, hauled by ox-drawn sleds across frozen rivers and snow-covered mountains. When Knox's guns were positioned on Dorchester Heights overlooking Boston Harbor, the British position became untenable, and General William Howe evacuated the city in March 1776. The thread connecting all of these pivotal events leads back to that confrontation at the New Haven powder house, where a headstrong merchant refused to wait for permission to act. Benedict Arnold's early contributions to the Revolutionary cause were genuinely extraordinary. He would go on to demonstrate remarkable courage at the Battle of Valcour Island on Lake Champlain in 1776 and again at the Battles of Saratoga in 1777, where his aggressive battlefield leadership helped secure the victory that brought France into the war as an American ally. Yet Arnold's story carries a profound and painful irony. The same fierce independence, the same impatience with authority, and the same sense of wounded pride that drove him to demand those keys in New Haven would eventually curdle into resentment and betrayal. By 1780, feeling underappreciated and passed over for promotion, Arnold entered into secret negotiations with the British and conspired to surrender the fortress at West Point. His name became permanently synonymous with treason in America. The scene at the New Haven powder house thus stands as a remarkable beginning — the first bold step of a military career that would encompass both the highest patriotism and the deepest betrayal the Revolution would ever know.
Apr
1775
Arnold Confronts Selectmen at Powder Magazine
Role: New Haven Merchant
# Arnold Confronts Selectmen at Powder Magazine On the morning of April 21, 1775, the news that every patriot had been dreading — and perhaps secretly hoping for — arrived in New Haven, Connecticut. Riders carried word that two days earlier, on April 19, British regulars had marched on Lexington and Concord in Massachusetts, exchanging fire with colonial militia in clashes that left dozens dead on both sides. The long-simmering tension between the American colonies and the British Crown had finally erupted into open bloodshed. Across New England, towns scrambled to respond, and in New Haven, a prosperous merchant and captain of a local militia company named Benedict Arnold saw his moment to act. Arnold was thirty-four years old at the time, a successful trader who had built a comfortable life through Atlantic commerce. But he was also a man of fierce ambition and restless energy, qualities that had already led him to organize and drill a volunteer militia company known as the Governor's Second Company of Guards. When the news from Lexington reached New Haven, Arnold immediately mustered his men and prepared to march north to join the fighting in Massachusetts. There was, however, a practical problem: the town's supply of gunpowder and musket balls was locked inside the powder magazine, and the keys were held by New Haven's selectmen — the elected officials who governed the town's affairs. Arnold went to the selectmen and demanded the keys. The selectmen, exercising the caution that their positions required, refused. Their reasoning was not unreasonable by the standards of colonial governance: they argued that they should wait for official orders from the Connecticut colonial legislature before releasing military stores. To act without authorization, they believed, would be reckless and potentially illegal. The powder belonged to the town, and dispersing it to an armed company marching off to an uncertain conflict was not a decision to be made in haste. Arnold, characteristically, had no patience for deliberation. He had gathered his armed company, and he made his position clear in terms that left little room for negotiation. According to accounts of the confrontation, Arnold told the selectmen that he would break into the magazine by force if the keys were not surrendered. Faced with a determined militia captain backed by armed men in a town already electrified by news of bloodshed in Massachusetts, the selectmen relented. They handed over the keys. Arnold's company collected the powder and ammunition they needed and soon marched north, joining the growing tide of militia forces converging on the British garrison in Boston. The confrontation at the powder magazine was a small incident, resolved without violence and largely forgotten in the torrent of dramatic events that followed. Yet it carried implications that rippled far beyond that single morning in New Haven. In microcosm, it captured one of the central tensions of the American Revolution: the conflict between established institutional authority and the revolutionary urgency that demanded immediate action. The selectmen were not loyalists or cowards. They were civic leaders trying to follow proper channels in a moment when proper channels were rapidly becoming irrelevant. Arnold, meanwhile, represented a new kind of authority — one rooted not in official mandate but in personal will, military readiness, and the conviction that extraordinary times demanded extraordinary measures. This same impulse would propel Arnold to extraordinary feats in the months and years ahead. Within weeks of the powder magazine confrontation, he would help lead the daring capture of Fort Ticonderoga from the British, seizing its valuable cannon. He would later command a grueling wilderness march to Quebec, fight with reckless bravery at the battles of Valcour Island and Saratoga, and earn a reputation as one of the Continental Army's most aggressive and capable field commanders. His willingness to act without waiting for permission, to push past institutional caution, made him indispensable in the early, desperate stages of the war. Yet the same contempt for institutional constraints that made Arnold effective also made him dangerous. His repeated clashes with civilian authorities, his resentment at being passed over for promotion, and his sense that the institutions he served were unworthy of his sacrifices would eventually curdle into one of the most infamous betrayals in American history — his 1780 conspiracy to surrender West Point to the British. The seeds of both Arnold's greatness and his treason were visible that April morning in New Haven, when a merchant-turned-militia-captain stood before his town's elected leaders and made clear that he would not wait for anyone's permission to go to war.
Apr
1775
Benedict Arnold Leads New Haven Militia to Cambridge
Role: New Haven Merchant
# Benedict Arnold and the March from New Haven to Cambridge In the spring of 1775, the American colonies stood on the razor's edge between protest and open rebellion. For years, tensions between the British Crown and its colonial subjects had escalated through a series of provocations and reprisals — the Stamp Act, the Boston Massacre, the Tea Party, and the Intolerable Acts — each one pushing the two sides further from reconciliation. Massachusetts, long the epicenter of resistance, had become a powder keg. When British regulars marched out of Boston on the night of April 18, 1775, intent on seizing colonial military stores at Concord and arresting rebel leaders, the spark finally touched the fuse. The battles at Lexington and Concord on April 19 left dozens dead on both sides and sent shockwaves rippling through every colony. Riders galloped south and west carrying the alarm, and the question facing every town, every militia company, and every man of fighting age became immediate and unavoidable: what would they do now? In New Haven, Connecticut, that question fell with particular force on Benedict Arnold, a thirty-four-year-old merchant and sea trader who had built a comfortable life in the town through ambition, intelligence, and sheer force of will. Arnold was already captain of the Governor's Second Company of Foot Guards, an elite volunteer militia unit whose members outfitted themselves in handsome uniforms and drilled with a seriousness that set them apart from ordinary town militia. When news of the bloodshed at Lexington and Concord reached New Haven on or around April 21, Arnold wasted no time deliberating. He assembled his company and resolved to march them north to Cambridge, Massachusetts, where colonial militia forces were rapidly converging to lay siege to the British garrison in Boston. There was, however, an obstacle. The company needed gunpowder and ammunition for the march, and those supplies were locked inside the town's powder house, controlled by New Haven's selectmen. When Arnold approached the selectmen and demanded the key, they hesitated. The civil authorities were understandably cautious. Handing over military stores to a militia company marching toward a conflict with the British army was an act with profound consequences — it meant that New Haven, as a community, was committing itself to armed resistance. The selectmen's reluctance reflected the genuine uncertainty and fear that gripped many communities in those early, chaotic days of the conflict, when no one could predict how events would unfold or whether the rebellion would succeed or be crushed. Arnold, however, was not a man inclined toward patience or half-measures. Confronting the selectmen directly, he reportedly declared that he would break down the door of the powder house if the key was not surrendered. Faced with Arnold's unyielding determination and the fervor of his assembled guardsmen, the selectmen relented. Arnold secured the powder and supplies, and on April 22, 1775 — just three days after Lexington and Concord — he led his company out of New Haven on the long march north toward Cambridge. They were among the first organized military units from Connecticut to respond to the alarm, a distinction that reflected both Arnold's personal decisiveness and the patriotic commitment of the men who followed him. This episode matters far beyond its immediate drama. The opening weeks of the Revolutionary War were defined not by orders from a central authority — the Continental Congress had not yet created a unified army — but by the spontaneous initiative of local leaders and communities who chose, on their own, to act. Arnold's confrontation with the New Haven selectmen illustrates the tension between cautious civil governance and the urgent demands of a revolutionary moment. It also offers an early glimpse of the qualities that would make Arnold one of the most brilliant and aggressive field commanders of the entire war, a man whose daring at Fort Ticonderoga, on Lake Champlain, and at the Battles of Saratoga would prove indispensable to the American cause — long before his infamous betrayal in 1780 would make his name synonymous with treason. On that April morning in New Haven, however, Benedict Arnold was simply a patriot who refused to wait.