I suspect that your W. B. Amacher, aka W, D. Amacher/Amacker, died of disease July, 1862 at Columbus, Miss. In their cursive of the time ‘k’ and ‘h’ are hard to distinguish
38th Mississippi Infantry/
The companies for this regiment had their rendezvous at Jackson, and Colonel Fleming W. Adams was elected May 12, 1862, and later, on the 16th, the other field officers, Brent and Foxworth. The regiment was ordered to Corinth, then occupied by the army under General Beauregard, confronted by the army of General Halleck, and the regiment was there a few days before the evacuation, May 29, when they joined in the retreat toward Tupelo. The whole army suffered seriously from sickness during the occupation of Corinth, and this regiment, being new, lost many by death during May and June. The regiment was ordered to Columbus to recruit about July 1, and in August to Saltillo
https://mississippigenealogy.com/lawrence/38th_ms_inf.htm