There’s more we could have added- French terms are particularly descriptive- boyaux, a military term for communications trenches, can literally be translated as bowels or guts. A vidette, related to latin words about seeing and watching, is a mounted sentry in advance of the outposts of the army.
Also- sometimes we read or reread a regimental account that provides great descriptions of some of the features we've already posted. In this case, James A. Emmerton, AA Record of the Twenty-third Regiment Mass. Vol. Infantry in the War of the Rebellion 1861-1865, provides good descriptions of the Confederate mine explosion of August 5, 1864, and has been added to our discussion of that topic.
He also has a vivid description of the August 15, 1865 flood, which has been added to
Dams and Inundations.
"A Strange Sort of Warfare Underground"cord of the Twenty-third Regiment Mass. Vol. Infantry in the War of the Rebellion 1861-1865