Vietnam War economics, military-industrial complex, Bretton Woods collapse—this deep dive tracks how Gulf of Tonkin escalation turned into a profit engine. We unpack military Keynesianism, cost-plus-award-fee contracts, RMK-BRJ no-bid deals, Agent Orange and napalm revenues, and the aerospace helicopter boom. Then we follow deficit financing, the tax surcharge fight, inflationary demand-pull spirals, Triffin's dilemma, the gold drain, and the Nixon Shock that ended dollar-gold convertibility. Finally, we measure opportunity costs: Great Society cutbacks, balance-of-payments stress, veterans' burdens, and the long legacy of perpetual war spending. Sources, statistics, and historical context connect battlefield decisions to monetary policy, lobbying networks, and deficits.