United States holds a 92–8 advantage over Italy on the Relative Advantage Index, a decisive margin.
The margin is driven by military spending (95% of the combined total, $954bn) and economic size (GDP) (92% of the combined total, $28.8tn).
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side. Those factors are excluded and the remaining weights renormalised, never substituted.
| Factor | Italy | Share | United States | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $48.1bn | 5%95% | $954bn | 33% |
Economic size (GDP) World Bank WDI | $2.4tn | 8%92% | $28.8tn | 27% |
Active personnel COW NMC | 161.0k | 11%89% | 1.4m | 20% |
Logistics & power projection OurAirports | 152 | 9%91% | 1.6k | 20% |
Shares are each side's portion of the combined total for that factor. Weights are renormalised across the factors both sides publish — see the methodology. Data read 2026-08-04.
Every combination inside the top 30 of the Composite Power Index.
Bordering states — the comparisons people actually search for.