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Missouri State University

Defending American Credibility: The U.S. Commitment to the Republic of South Vietnam

Abstract

dc:description.abstract

Critics of the American commitment to defend the Republic of South Vietnam argue that the United States made a vast military and political commitment in an area of little apparent geopolitical importance – an area whose political destiny would not drastically alter the overall balance of power in the bipolar international system of the Cold War. This thesis will challenge this critique of the Vietnam War by elucidating the strategic rationale that inspired the United States to support and defend the South Vietnamese government and underscoring the strategic importance of Vietnam to the United States. The research will examine the decision-making of Truman, Eisenhower, Kennedy, Johnson, and Nixon administrations to understand how the United States first got involved in Vietnam, why Vietnam represented a strategically important area to U.S. security interests, why the United States’ commitment to South Vietnam was justified, what factors compelled it to remain commitment to the South Vietnamese government, and why it finally disengaged from Vietnam. The thesis will argue that Vietnam was vital to the overall policy of containment. The country represented the cornerstone of the Free World in Southeast Asia; a Communist victory in Vietnam would imperial the survival of other free nations in Southeast Asia and would strike a devastating blow to the strategic interests of the United States. It would result in further Communist aggression, not only in Southeast Asia but in other parts of the free world as well. The primary objective of the United States in Vietnam was to honor the strategic principles of the containment policy and demonstrate American’s credibility as a military power and reliable ally, thereby deterring its enemies and assuring its allies around the world.

Degree

thesis:*
Name thesis:degree_name
Master of Science in Defense and Strategic Studies
Level thesis:degree_level
Masters
Discipline thesis:degree_discipline
Defense and Strategic Studies
Year
2005

Author and committee

dc:creator, dc:contributor.*
Author dc:creator
  • Lai, Dinh M.
Contributors dc:contributor
  • C. Walton

Subjects

dc:subject × 6

Rights

dc:rights
Statement dc:rights
  • © Dinh M. Lai

Identifiers

dc:identifier.*
Repository record dc:identifier
https://bearworks.missouristate.edu/theses/1389
OAI identifier oai:identifier
oai:bearworks.missouristate.edu:theses-2390

Chain of custody

source
Harvested from
Missouri State University
Base URL
bearworks.missouristate.edu/do/oai/
Last updated
2026-07-24
Source record
OAI-PMH GetRecord
citation

Lai, Dinh M.. Defending American Credibility: The U.S. Commitment to the Republic of South Vietnam. Masters thesis, 2005. https://bearworks.missouristate.edu/theses/1389