Capt. Frederick E. Prime: Born in Italy on Sept. 24, 1829, Prime graduated at the top of the West Point Class of 1850. He spent his pre-war career building fortifications along the Atlantic and Gulf coasts. Elevated to captain at the outbreak of hostilities, Prime was wounded and captured in the Battle of Mill Springs, Kentucky, on Dec. 5, 1861. Following his exchange in the spring of 1862, he was assigned as chief engineer on Grant’s staff.