Here are some facts for you.
1. Lee committed treason.
2. Secession was illegal.
3. Southern shore batteries opened fire on Ft. Sumter. 4/ I'm not disparaging Southerners. I'm disparaging the Confederacy and all who support it 5. The South launched a war it had every intention of winning. It lost. 6. The Confederacy was created by The Democrat Party. You keep trying to drag this argument into the weeds of moral and historical relativism and it's not working. You can't bring yourself to admit you're not only a Confederate sympathizer but you're a Democrat.
“Lee committed treason, re Article 3 of the Constitution.”
Read it again, for the first time: “No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court.”
You have found that Lee committed treason. Did he re Article 3 of the Constitution?
The reason I ask is because it sounds like something that you just made up.