Interesting character, I like how he deserted( mid 1941) to join the Canadian Army and joined my grandfather's regiment and while in England the USA joined the war so he transferred back to the US Army. He served with distinction winning the Silver Star, plus then a sergeant, next took part in the Allied invasion of Italy and fought in the Battle of Salerno and the subsequent Battle of Anzio. It was at this time that the U.S. Army discovered Millet's 1941 desertion; he was court-martialed, convicted, ordered to pay a US$52 fine, and stripped of his leave privileges. Only weeks later, he was given a battlefield commission to second lieutenant.
So it only took the army bureaucracy almost 3 years to figure out he had deserted( to fight Nazis) then returned and served with distinction.