I remember one man in the Stockade who cut his hand with the sharp corner of a card of corn bread he was lifting from the ration wagon; gangrene set in immediately, and he died four days after.
One form that was quit prevalent was a cancer of the lower one corner of the mouth, and it finally ate the whole side of the face out.

Of course the sufferer had the greatest trouble in eating and drinking.

For the latter it was customary to whittle out a little wooden tube, and fasten it in a tin cup, through which he could suck up the water.

As this mouth cancer seemed contagious, none of us would allow any one afflicted with it to use any of our cooking utensils.

The Rebel doctors at the hospital resorted to wholesale amputations to check the progress of the gangrene.
They had a two hours session of limb-lopping every morning, each of which resulted in quite a pile of severed members.