ARLINGTON, Va. — Beginning in September, the Army each month will designate one U.S.-based brigade as a “force stabilized” unit that will arrive, train and fight as a unit for three years before turning over as a group. At the same time, the service will begin a “home basing” approach, which will keep junior soldiers at one installation for six to seven years — well beyond the current three-year average, according to Brig. Gen. Sean Byrne, the Army’s director of military personnel policy. Force stabilization, as the initiative is known, is supposed to foster “increased readiness and stability for the...