About John Clark
John Clark was an American spy and military personnel.
Maj. John Clark, Jr. (ca. 1751-1819) was an American spy for George Washington. He was primarily responsible for operating the intelligence network in and around Philadelphia during the British occupation of that city during the American Revolutionary War.
Early career Clark was commissioned as a first lieutenant in the 1st Continental Infantry (Pennsylvania Rifles) on January 1, 1776, and was made a major of the 2nd Pennsylvania Battalion of the Flying Camp on September 14, 1776. He originally came to the attention of George Washington during the evacuation of Long Island and Manhattan. Directed to travel across Long Island Sound, he then scouted troop movements on Long Island.
Revolutionary War
Clark was responsible for operating one of the most notable spy rings organized and run by the Continental Army during the war, one which prevented the destruction of Washington's army at least three different times.
His most important assignment occurred during the period of September to December 1777, when despite a serious injury to his shoulder suffered at Brandywine, he was tasked by Washington with obtaining information about General Howe's activities in Philadelphia. When Washington learned of this hoax, he prepared a false report of the Continental Army's strengths and planned movements, and ordered it to be delivered to Howe.
In December, with his wound still not healed, and after having not seen his wife in more than a year, Clark asked Washington for permission to travel home. Washington agreed, and introduced Clark to Henry Laurens, who gave Clark a desk job as auditor of Army expenses. Clark resigned in November 1779 to preserve his health.
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Important facts
Frequently asked questions
Who was John Clark?
American Revolution spy
What was John Clark's occupation?
John Clark was a spy and military personnel.
What nationality was John Clark?
John Clark was American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). John Clark. https://biography.guide/john-clark-spy/
MLA: "John Clark." Biography.guide, https://biography.guide/john-clark-spy/.
Chicago: "John Clark." Biography.guide. https://biography.guide/john-clark-spy/.
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