One of my favorite personal stories of the war, had some relevance in Arkansas. It involves my GG Grandfather & his brother.
Two brothers both from, a wide spot in the road, in Missouri. At the outbreak of the war, one was 22, the other 17. The older brother, had taken in the younger. In the 1860 census, older brother is head of household, with a wife, a daughter, & his little brother. His first child died of disease, wasn't that uncommon at the time.
Once poo hits the fan, older brother volunteers, & joins the MSG under Price. Younger brother joins Co F 4th MO Vol Cavalry
Both were at the Battle of Pea Ridge. Older brother is captured at the battle.
Their Mother died during the war. I can only imagine how she felt with her only 2 sons fighting on opposite sides.
They both survived but, I have no idea if they ever had a relationship post-war. Likewise, I don't know if they made contact with each other on the battle field, or once older brother was captured. I just know, post war, older brother named his next son, Stonewall Jackson *surname*. They both died within a few months of each other, in 1911.