[2] McComb fought in many important battles of the Civil War's Eastern Theater.

He erected a flour mill in Cumberland County and was involved in various manufacturing interests.

When the Civil War broke out, McComb chose the Confederacy despite his Northern birth and enlisted as a private in the 14th Tennessee Infantry Regiment.

[2] McComb was wounded in several battles, including Gaines' Mill, Antietam,[3] and Chancellorsville.

After the war, McComb lived in Alabama and Mississippi, eventually settling in Gordonsville, Louisa County, Virginia, where he was a farmer for nearly fifty years.