During the Civil War he was a member of the 59th Regiment of Tennessee Infantry, and was captured at Vicksburg on July 4, 1863. He was paroled on July 10, but reenlisted in the CSA after returning to Grainger Co.
Calvin was well educated, and after the war became a school teacher in Bartholomew County, Indiana. After teaching for several years he began farming, and married Josephine Simmonds, daughter of Wesley Simmons
The marriage produced five children: Cora, born c1870, became a school teacher, and married Frank Linke; Walter, born c1876, became a professor in Animal Husbandry at the University of Illinois and was later Dean at University of Minnesota at St. Paul; Webster*, born c1880, grew cotton in Texas and became wealthy when oil was discovered on his property; Joel, born c1885, died Nov., 1951, was a professor of Animal Husbandry at Ohio State University; Margaret was a nurse in Indianapolis.
Source: Hawk, E. L. (Ellis Leroy), compiler, The Hawk Family