Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The 20th Ohio Infantry was organized at April through May 1861 in response to President Lincoln's call for 75,000 volunteers and mustered into service on May 23, 1861 under the command of . The regiment was ordered to western Virginia and attached to Kelly's Command. It participated in action at Richter June 23 and the pursuit of Garnett July 15 16. The regiment then performed duty along Baltimore & Ohio Railroad until August and mustered out on August 23, 1861. The 20th Ohio Infantry was reorganized at Columbus August 19 through September 21, 1861 and mustered in for three years service on October 21, 1861 under the command of Colonel Charles Whittlesey.