Which broader strategic aim of U.S. involvement in Vietnam during the Cold War did the plan emphasize?

• A. To promote a regional free-trade zone in Southeast Asia
• B. To avoid any entanglement in Asian affairs
• C. To win a decisive, rapid victory
• D. To contain the spread of communism in Southeast Asia (containment)

Answer: (D)

The plan is shaping the long-term goal of containment: stopping the spread of communism in Southeast Asia. In this view, Vietnam is a hinge point for the region—if Vietnam fell, nearby countries might follow—so the United States worked to keep South Vietnam non‑Communist and to deter North Vietnam through a combination of military support, political stabilization, and alliances. This presses for a drawn-out effort to preserve a non-Communist Southeast Asia, not a quick, decisive victory or unrelated economic aims like a regional free-trade zone.