The Trump administration has accelerated reductions in U.S. forces and capabilities assigned to NATO, including announced withdrawals of roughly 5,000 troops from Germany and additional brigade combat teams from Europe, alongside cuts to fighter jets, bombers, tankers, maritime patrol aircraft, and naval assets made available for alliance operations. A June 2026 six-month Pentagon review of force posture and NATO Force Model contributions, coupled with public statements favoring a “NATO 3.0” in which Europe assumes primary defense responsibility, has heightened trader focus on disengagement risks. Formal treaty withdrawal remains constrained by 2023 legislation requiring two-thirds Senate approval or an act of Congress, plus bipartisan congressional resistance and upcoming 2026 legislative dynamics. Recent NATO summits and allied burden-sharing increases have not reversed the trajectory of incremental U.S. drawdowns, though nuclear commitments and command structures have seen fewer immediate changes.