History20th century (1960s-1970s)Laos / Southeast Asialow confidence

By 1970, Operation Momentum cost $500 million annually, equivalent to about $3.3 billion today.

Notes on verification

Consistent figure repeated across multiple independent sources (Nikkei Asia article by the original book author, Forbes, Greydynamics), all tracing to Kurlantzick's well-regarded book. No contradicting figures found.

Sources