Seeing military couples succeed and start a future together makes me so happy and hopeful.
Her law degree would actually get Lucy promoted faster initially (though 6 years older and a Major still works perfectly). Assuming she went to law school straight after West Point, she'd go into the Army as a First Lieutenant (O-2), then become a Captain (O-3) only 6 months later. Then it's 4 years min time in grade, 7 max, to become a Major. Then there's 4 -7 TIG again to become a Lt Col.