 Complete the following phrase:  Barnum entered the U.S. service on May 13, 1861, as captain of Company I, 12th N.Y. Infantry, at the age of 27; and afterward in October 1861 was promoted to major of that regiment. He served with distinction with that command, including the Peninsula Campaign under Maj. Gen. George B. McClellan, until July 1, 1862, when he was dangerously wounded by gunshot through the left ilium, at 