The Culper Spy Ring – Facts, Code & Importance

Between 1778 and 1783, while the American Revolution decided the fate of a continent, one of the most consequential battles was fought in silence. The Culper Spy Ring was a Patriot intelligence network operating out of British-occupied New York and Setauket, Long Island, gathering information on troop movements, fortifications and naval preparations for General George Washington. Its story matters to the wider history of Indigenous and colonial North America because it unfolded on Long Island and Manhattan — territories traditionally associated with the Lenape and the Metoac-speaking communities of Long Island — during a war in which Native nations were courted, divided and often displaced by both Britain and the rebellious colonies. Understanding the Culper Ring is understanding how information, geography and allegiance shaped the American Revolution.

Origin of the Culper Spy Ring

British forces occupied New York in August 1776, and the city remained a British stronghold and major naval base for the duration of the Revolutionary War. Getting information out of New York was critical to Washington, commander of the Continental Army, yet no reliable Patriot intelligence network existed at that time. That changed in 1778, when a young cavalry officer named Benjamin Tallmadge established a small group of trustworthy men and women from his hometown of Setauket, Long Island. Known as the Culper Spy Ring, Tallmadge’s homegrown network would become the most effective intelligence-gathering operation on either side of the conflict.

The Dangers of Spying

In mid-September 1776, the American officer Nathan Hale was hanged without trial in New York City. British authorities had caught Hale as he made his way back to his regiment after penetrating the British lines to gather information. Hale’s death illustrated the grave dangers inherent in spying for the rebels, especially inside the British stronghold of New York. Meanwhile, Benjamin Tallmadge, a young cavalry officer from Setauket, had enlisted when the Revolution began in 1775 and was soon awarded the rank of major. In mid-1778, Washington appointed Tallmadge head of the Continental Army’s secret service, charged with establishing a permanent spy network operating behind enemy lines on Long Island. The stakes could not have been higher: capture meant execution without trial, and the geography of occupied territory made every courier route a gamble.

Workings of the Culper Spy Ring

Tallmadge recruited only those he could absolutely trust, beginning with his childhood friend, the farmer Abraham Woodhull, and Caleb Brewster, whose main task during the Revolution was commanding a fleet of whaleboats against British and Tory shipping on Long Island Sound. Brewster, one of the most daring of the group, was also the only member the British had definitely identified as a spy. Tallmadge used the code name John Bolton, while Woodhull operated as Samuel Culper. Woodhull, who began running the group’s day-to-day operations on Long Island, also personally traveled back and forth to New York collecting information and observing naval maneuvers. He evaluated reports and determined what would be taken to Washington.

Dispatches were then given to Brewster, who carried them across the Sound to Fairfield, Connecticut, from where Tallmadge passed them on to Washington. Woodhull lived in constant anxiety of being discovered, and by the summer of 1779 he had recruited another man, the well-connected New York merchant Robert Townsend, to serve as the ring’s primary source in the city. Townsend wrote his reports as Samuel Culper, Jr., and Woodhull went by Samuel Culper, Sr. — a layered anonymity that protected both men and the network itself.

Couriers, Signals and the Role of Women

Austin Roe, a tavernkeeper in Setauket who acted as a courier for the ring, traveled to Manhattan with the excuse of buying supplies for his business. A local Setauket woman and Woodhull’s neighbor, Anna Smith Strong, was also said to have aided the spy ring’s activities. Her husband, the local Patriot judge Selah Strong, had been confined aboard the British prison ship HMS Jersey in 1778, and Anna Strong lived alone for much of the war. She reportedly used laundry on her clothesline to leave signals regarding Brewster’s location for meetings with Woodhull — an ingenious system relying on everyday objects rather than written messages. Such methods echo older Indigenous and colonial communication practices across the Northeast, where smoke signals, wampum belts and messenger networks carried meaning through landscape and material culture long before the Revolution. For deeper context on how Native communication and alliance systems worked, see what wampum was and how it was used.

Achievements of the Culper Spy Ring

Despite some strained relations within the group and constant pressure from Washington to send more information, the Culper Spy Ring achieved more than any other American or British intelligence network during the war. The information collected and passed on from 1778 to 1783 concerned key British troop movements, fortifications and plans in New York and the surrounding region.

Perhaps the group’s greatest achievement came in 1780, when it uncovered British plans to ambush the newly arrived French army in Rhode Island. Without the spy ring’s warnings to Washington, the Franco-American alliance — formalized after Franklin’s diplomatic mission to Paris secured French support — may well have been damaged or destroyed by this surprise attack.

The Culper Spy Ring has also been credited with uncovering information involving the treasonous correspondence between Benedict Arnold and John André, chief intelligence officer under General Henry Clinton, commander of the British forces in New York. The two were conspiring to give the British control over the American fort at West Point. Major André was captured and hanged as a spy in October 1780, on Washington’s orders.

Why the Culper Ring Still Matters in Revolutionary History

• First sustained American intelligence network: it operated continuously across five years of occupation.
• Civilian-based: merchants, tavernkeepers and farmers, not career soldiers, formed its backbone.
• Multilayered secrecy: coded aliases, invisible ink and courier relays minimized interception risk.
• Strategic impact: warned Washington of the Rhode Island ambush and exposed the West Point conspiracy.
• Geographic reach: linked Setauket, Manhattan, Connecticut and the Continental Army’s headquarters.

The Revolution that the Culper Ring served also reshaped the lives of Native nations caught between empires. The same conflict that brought France into the war through diplomacy also drove settler expansion west of the Appalachians, a process the Proclamation of 1763 attempted — briefly — to restrain.

Historical Context & Key Cultural Takeaways

The Culper Spy Ring represents the birth of organized American intelligence. Established in 1778 by Major Benjamin Tallmadge under the direct authority of General George Washington, the network combined civilian trade routes, coded correspondences and a relay across Long Island Sound to deliver reliable information from occupied New York. Its members — Abraham Woodhull, Caleb Brewster, Robert Townsend, Austin Roe and Anna Smith Strong — worked under aliases and constant threat of execution. Nathan Hale’s hanging in 1776 demonstrated the cost of failure, making the ring’s longevity remarkable.

The spy ring’s historical importance rests on three pillars: it provided intelligence that protected the Franco-American alliance in 1780; it helped expose Benedict Arnold’s conspiracy to surrender West Point; and it demonstrated that irregular, civilian-based networks could match formal military intelligence services. Placed within the broader history of colonial and Indigenous North America, the Culper Ring also reminds us that the Revolution was fought on lands whose original inhabitants — including the Lenape and the Long Island communities — remained active political actors even as settler institutions expanded around them.

Frequently Asked Questions

Who founded the Culper Spy Ring?

Major Benjamin Tallmadge founded the network in 1778 under orders from General George Washington. Tallmadge recruited the first members from his hometown of Setauket, Long Island.

What were the code names used by the Culper Spy Ring?

Tallmadge used John Bolton; Abraham Woodhull used Samuel Culper; Robert Townsend used Samuel Culper, Jr. The name “Culper” may have been drawn from Culpeper County, Virginia, the birthplace of an acquaintance.

What was the ring’s greatest achievement?

In 1780, the Culper Ring uncovered British plans to ambush the newly arrived French army in Rhode Island. Warning Washington in time preserved the Franco-American alliance. The ring also helped expose the Benedict Arnold–John André conspiracy to hand over West Point.

Did women participate in the Culper Spy Ring?

Yes. Anna Smith Strong of Setauket reportedly used her clothesline laundry to signal Caleb Brewster’s arrival and location for meetings with Abraham Woodhull, using household objects as a covert communication code.

How did Nathan Hale’s fate affect the ring?

Hale was hanged without trial in New York City in September 1776 after penetrating British lines to gather intelligence. His execution underscored the life-or-death risk of espionage and shaped the extreme caution with which Tallmadge built the Culper network two years later.

Did the Culper Spy Ring operate in Native American territory?

The ring operated on Long Island and in Manhattan — regions traditionally associated with the Lenape and the Metoac-speaking communities of Long Island. While the network itself was a colonial Patriot operation, its geography overlaps with territories whose Indigenous peoples remained present and politically engaged throughout the Revolutionary era.

Cultural Legacy and Modern Preservation

The Culper Spy Ring’s legacy lives on in museums, heritage trails and archives across Long Island and Connecticut. The Setauket area preserves sites associated with the network, and historians continue to study the coded dispatches, invisible-ink letters and courier chains that sustained the operation. For students of both the American Revolution and the deeper history of the Northeast, the Culper Ring offers a case study in how information — quietly gathered, carefully protected — could alter the course of an empire.

Its story belongs alongside the broader narrative of how Native and colonial communities alike navigated a war that redrew the map of North America, a conflict whose consequences for Indigenous sovereignty would reverberate long after the last British ship left New York harbor.