If I understand correctly, the command general needs to sign off on the sentence. With Trump as boss, cannot see him signing off on this sentence. Career limiting and treasonous.
I just looked this up and given the way it is they will sign off on it. No choice. I thought perhaps a review by the Secretary of the Army might be able to overturn the sentence, but he can’t and neither can Trump. All that can happen is to transfer the Judge to some remote outpost.