About Michael Corcoran
Lived 1827 – 1863 (aged 36). Michael Corcoran was an American military officer.
Michael Corcoran (21 September 1827 – 22 December 1863) was an Irish-American general in the Union Army during the American Civil War and a close confidant of President Abraham Lincoln. As its colonel, he led the 69th New York Regiment to Washington, D.C., and was one of the first to serve in the defense of Washington by building Fort Corcoran. He then led the 69th into action at the First Battle of Bull Run. After promotion to brigadier general, he left the 69th and formed the Corcoran Legion, consisting of at least five other New York regiments.
Early life
Corcoran was born in Carrowkeel, near Ballysadare, County Sligo in Ireland, the only child of Thomas Corcoran, an officer in the British Army, and Mary (McDonagh) Corcoran. Through his mother, he claimed descent from Patrick Sarsfield, hero of the Williamite War in Ireland and a leader of the Wild Geese. On 30 August 1849, he emigrated from Sligo Bay to the U.S. and settled in New York City
Corcoran became involved in Democratic politics at Tammany Hall: he could deliver the Irish vote. He became district leader, a member of the judicial nominations committee, an elected school inspector for his ward, and a member of the Fourteenth Ward General Committee.
Civil War Officers of the 69th New York Volunteer Regiment pose with a cannon at Fort Corcoran in 1861. Michael Corcoran at left With the outbreak of war, the court martial was dropped
In April 1863 Corcoran was involved in an incident that ended with Corcoran shooting and killing Edgar A. Kimball, commander of the 9th New York Volunteer Infantry Regiment. At a court of inquiry, Kimball was faulted for interacting with Corcoran though Kimball was not on duty and was not a sentry, and for using menacing and insulting language. In addition, some witnesses suggested that Kimball was intoxicated when he confronted Corcoran. The monument was sculpted by Philip Flanagan. The inscription around the top of the monument reads "Michael Corcoran 1827–1863" Around the base is inscribed "New York Ballymote Creeslough Bull Run". Underneath the monument is a piece of steel from the World Trade Center, donated by the family of Michael Lynch, who died in the towers on 11 September 2001. Lynch's family are also from County Sligo.
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Important facts
People in Michael Corcoran's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Michael Corcoran's
Frequently asked questions
Who was Michael Corcoran?
Union Army general
When was Michael Corcoran born?
Michael Corcoran was born on 21 September 1827 in County Sligo.
When did Michael Corcoran die?
Michael Corcoran died on 22 December 1863 in Fairfax.
What was Michael Corcoran's occupation?
Michael Corcoran was a military officer.
What nationality was Michael Corcoran?
Michael Corcoran was American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Michael Corcoran. https://biography.guide/michael-corcoran-military-officer/
MLA: "Michael Corcoran." Biography.guide, https://biography.guide/michael-corcoran-military-officer/.
Chicago: "Michael Corcoran." Biography.guide. https://biography.guide/michael-corcoran-military-officer/.
Data last updated: 2026-09-24 · Spot an error? Report a correction.
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