Ironic, too, since Calley should have been executed. I thought it was Nixon who demanded he be given house arrest and not prison. I guess I misread this most recent article, I thought he had been given 10 years in prison.
10 years was the final sentence, he actually served about 3 before being released from incarceration. It was the Secretary of Defense that actually signed off on the final sentence, but you may be correct about it being done on Nixon's orders.