USNI News – When Marine Corps Commandant Gen. David Berger laid out his vision for the Marine Corps, it included a fundamental manpower shift. Instead of the service’s generations-old train-and-replace model that relied on young Marines who signed on for a single four-year enlistment, the commandant of the Marine Corps shifted its priorities to emphasize retaining Marines. It has been nearly two years since Berger released Talent Management 2030, which laid out how the force would begin to recruit, train and retain Marines.