Robert E. Lee and treason in the same post.
Irony?
No irony at all.
He resigned his commission and fought to defend his country.
He was born in 1807 31 years after the United States was formed. His commission was a US Army commission. He left his country and aligned with those that wanted to destroy it. A fascinating complex guy of high moral character and a great general but don't think what he did wasn't going to fight against America.