Edmund J. Davis was one of the about 2,000 Texans who fought in the Union army during the Civil War. He survived to become the last Reconstruction governor.
But there were many more who offered their dissent at home and some were punished for it, including in the still-celebrated Nueces Massacre of German Unionists and the little-remembered Great Hanging in Gainesville of suspected Anglo Unionists, possibly the largest example of vigilante violence in American history.
THE TEXAS SCRIBBLER 
Have you ever done any reading on the Taylor-Sutton feud?
I have often touched on it in a peripheral manner, but I’m thinking I’ll go ahead and dive in. Some interesting things going on around there in those times.
Vaguely remembered it after you mentioned it. Amazon has several books on it:
http://amzn.to/IycGYj