Here are a few examples from their roster

4th Arkansas Cavalry, U. S. A.

Columbus L. Harris Died on 1/22/1865 at Duvall's Bluff
Diarahoea Chronic & Enysiplas
Littleton Arnold Died on 1/15/1865 at Duvall's Bluff, age 42,
Exhaustion caused by Chronic Diarrhea
William H. Bankston Died on 11/15/1864 at Duvall's Bluff
Whooping Cough
Joseph N. Belchey Died on 2/23/1865 at Duvall's Bluff

Pneumonia
James C. Blair Died on 1/28/1865 at Duvall's Bluff

Typhoid Malarial Fever

Compiled Service Records of Volunteer Union Soldiers Who Served in Organizations from the State of Arkansas