 Complete the following phrase:  He was made assistant quartermaster general on the staff of the Governor of Ohio on 17 April 1861, and during the Western Virginia Campaign acted as chief engineer of the Ohio troops. At the expiration of his three months service he was appointed, on 15 August 1861, colonel of the 20th Ohio Infantry, and detailed as chief engineer of the Department of the Ohio, with charge of planning and constructing the defenses of Cincinnati. He was present at the 