For nearly a decade the United States was actively involved in a war halfway around the world in South Vietnam which cost her approximately 56,000 lives and $150 billion.
Shelton, Huntly E. Jr.
"Set & Drift: National Security Models and Vietnam,"
Naval War College Review: Vol. 30
, Article 8.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol30/iss2/8