Reagan defense buildup (1981-1989)
1981-1989What Happened
President Ronald Reagan oversaw a roughly 35% real-terms increase in US defense spending over his two terms, from about $300 billion to $400 billion in 1988 dollars. NATO allies followed at smaller magnitudes. The buildup financed new submarines, the B-1 bomber, and the early Strategic Defense Initiative, and was framed as a response to Soviet capabilities.
Outcome
Defense industrial base expanded sharply; the Pentagon's share of federal spending peaked above 6% of GDP in the mid-1980s.
The buildup is widely credited as one factor that strained Soviet finances ahead of the USSR's 1991 collapse, though the causal weight remains debated. It also created procurement and industrial overcapacity that took most of the 1990s to absorb.
Why It's Relevant Today
Reagan's experience is the canonical case of a peacetime Western rearmament cycle — and a reminder that such cycles tend to outlast the political moment that started them. The current European buildup is being compared to it directly by analysts at CSIS, IISS, and SIPRI itself.
