What is the name of this infantry regiment of the United States Army, whose captain was John McCunn?
John McCunn: John H. McCunn (Nov. 2, 1820–Jul. 6, 1872) belonged to a poor Irish immigrant family who arrived in New York City in the 19th century. John McCunn:  When the American Civil War began in 1861 he joined the Union Army as a Captain in the 69th New York Infantry Regiment before he recruited the 37th New York Infantry which he commanded as colonel. 69th Infantry Regiment (New York): The 69th Infantry Regiment is an infantry regiment of the United States Army.
69th Infantry Regiment