I might come back to this, but in the mean time, I've written somewhat extensively on elements of 19th century combat, and it might be illuminating to read through some of those responses.

There are some differences in how combat was approached in the Civil War, and there are some nuances to relate about rifle technology and artillery, but the bare bones are very similar.

The Civil War is a little outside my typical wheelhouse, but if no one comes back to this I might return.