[3] Catterson and the 97th Indiana Infantry served the First Battle of Memphis in Tennessee on June 6, 1862, and the subsequent occupation of the city, until late in 1862.

[6] During Major-General William T. Sherman's March to the Sea in the winter of 1864, Catterson was part of the Army of the Tennessee, heading a brigade in its XV Corps beginning on November 22, 1864.

Also during the Carolinas Campaign, Catterson served very briefly as chief of staff to Major-General John A. Logan, the commander of the XV Corps.

Catterson was brevetted to brigadier-general in the Union Army on May 31, 1865, and was mustered out of the volunteer service on January 15, 1866.

[6] After the American Civil War, Catterson chose not to return to the practice of medicine; he moved to Arkansas, where he tried and failed at cotton speculation.

[4] He then became commander of the Arkansas's negro militia under Governor Powell Clayton, engaged in fighting against the Ku Klux Klan and defending freedmen,[6] and also as a U.S.