United States Regiments & Batteries > New York > Infantry
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1861
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| June 17 | Organized at New York City and mustered in for two years’ service |
| June 29 | Left State for Washington, D.C. and duty as Infantry in the Defenses |
| July 30 to August 4 | Attached to McCune’s Brigade and Franklin’s Brigade, Division of the Potomac |
| September 26 | Attached to Newton’s Brigade |
| October 25 | Designation of Regiment changed to 15th New York Engineers |