U.S. Strategic Airlift Fleet Cannot Simultaneously Support Two Major Conflicts

The U.S. Air Force operates approximately 222 C-17 Globemaster III and 45 C-5M Super Galaxy strategic airlifters. This fleet, which has not grown since the last C-17 was delivered in 2013, is the backbone of rapid global power projection. When the National Defense Strategy calls for the ability to deter in one theater while fighting in another, the implicit assumption is that airlift capacity exists to support both. It does not. Mobility Requirements Study analyses have consistently shown that the current fleet is sized for a single major contingency with limited capacity for concurrent operations elsewhere. This matters because airlift is the only way to move forces and supplies fast enough to matter in the opening days of a conflict. Sealift takes weeks; airlift takes hours. If China moves on Taiwan, the first U.S. response would be airlifting air defense systems, munitions, and personnel to allied bases in Japan, Guam, and the Philippines. Simultaneously, if Russia escalates in the Baltics, NATO would need airlift to reinforce eastern Europe. The math does not work. There are not enough airframes, crews, or tanker support to sustain two major air bridges at once. The problem is compounded by the age and availability rates of the existing fleet. C-5M aircraft, despite the Reliability Enhancement and Re-engining Program, still have lower mission-capable rates than C-17s. Maintenance demands are increasing as airframes accumulate flight hours. The Air Force has no funded program of record to replace or augment the strategic airlift fleet, and the C-17 production line closed in 2015. There is no quick way to build more even if funding appeared tomorrow. This problem persists because the Air Force's modernization budget is consumed by fighters (F-35, NGAD), bombers (B-21), and the nuclear triad. Mobility forces have historically been the bill-payer for combat aircraft programs. Airlift does not have a powerful constituency in Congress compared to fighter programs that spread jobs across many states. The result is chronic underinvestment in the force that actually moves everything else into position. Structurally, the Department of Defense plans for a force it cannot deploy. The gap between strategy and mobility capacity is papered over in war plans with optimistic assumptions about commercial augmentation (the Civil Reserve Air Fleet), allied contributions, and pre-positioning. But CRAF airlines have their own business needs, allied airlift is minimal, and pre-positioned stocks can be destroyed by an adversary's first strike. The airlift shortfall is a known risk that has been briefed to senior leaders for years, but it never rises to the top of the priority list because the crisis is always somewhere else.