 Complete the following phrase:  In April 1861, at the outbreak of the American Civil War, Wikoff enlisted as a private in the 1st Pennsylvania Infantry. The next month he was commissioned a first lieutet in the 15th U.S. Infantry. He was shot in the left eye at the Battle of Shiloh and wore an eye patch throughout the rest of his life. He also participated in the Battle of Chickamauga and the 