Because it wasn't his job to? Treason charges would have had to been made by the government. Various amnesty proclamations made by President Johnson, along with the passage of the 14th Amendment, ended any chance of trial even if anyone had wanted one.
But what you did was point out how easily the South got off for their rebellion. I defy you to name a single case of armed rebellion where the losing side got off so lightly or were incorporated back into the body politic so quickly.
I guess that is what they teach in the schools in New England or somewhere. It wasn’t entirely clear that secession was treason or rebellion. The north certainly could have taken a harder approach of legally prosecuting Confederates.
There were several southern officers executed, including Henry Wirz, the commander of Andersonville prisoner of war camp. Quantrell, the leader Quantrell’s raiders was killed when trying to flee to Mexico and refusing to surrender to union soldiers, and he would undoubtably have been tried if captured. Jefferson Davis and other Confederate leaders were imprisoned. I am sure Sherman would have been tried if he was captured by the Confederacy.
The parts of the south were extremely wealthy before the Civil War. The south was completely devastated by the war. This was due to the collapse of Confederate currency and Confederate government securities, the freeing of the slaves, the union naval blockade, and the union policy of burning, looting, shooting livestock, and destroying railroads and factories. A large portion of the working age white men were killed or disabled. After the war, the south was exploited under military occupation and rule by northern “carpet baggers”, when most white were prevented from voting.
Yeah, that was poorly written on my part. Thanks for catching that.