Hard to be sure with all the polygamy in the family. In his direct line, I guess you are right. I see that his father George headed the Automotive Council for War Production during WW2, so he made a contribution. The brother of his great grandfather Miles Pratt Romney, also named George Romney, appears to have been in the Mormon militia, the Nauvoo Legion, which fought against the U.S. Army in the 1858 Utah War.
BTW, I’m no Romney-bot, just a history buff.
Thanks, I know all that, I would never have started posting the information a couple of years ago if I hadn't discovered it by looking into the family, his father worked in a civilian administrative role and then ran as the antiwar republican candidate during the Vietnam War while Mitt was living in France being sheltered from the draft by a Mormon assigned draft deferment.
The fact that no Romney man has ever served the United States in uniform and that includes since before the Civil War, tied in with modern Romney politics that we can trace, seems to reveal an anti-Americanism in the Romney family.