15th Infantry Regiment
Mustered in: June 17, 1861
Designated 15th regiment of engineers: October 25,1861
The following is taken from New York in the War of the Rebellion, 3rd ed. Frederick Phisterer. Albany: J. B. Lyon Company, 1912.
This regiment, organized as infantry, served as such until October 25, 1861, when by the action of the War Department it was converted into a regiment of engineers and designated the 15th Regiment Engineers, under which title its record and service will be found.