Lessons of the Vietnam War: Politics, Military, and Public Support

Introduction: Learning from Failure

It is often said that more can be learned through failure than through success, and in the history of the United States, the Vietnam War stands as one of America's most famous failures. It is therefore reasonable to assume that the nation learned some valuable lessons from that experience. Even while the war was being waged, debate raged about its conduct, and as soon as the United States withdrew its forces, that debate turned to the lessons that could be drawn from the failure. In the Bulletin of the Atomic Scientists February 1970 issue, Walter Goldstein placed the blame on systemic failures in the political system that allowed "a mis-application of military might" (Goldstein, 1970). The systemic failures Goldstein identified centered on the inability of Congress to restrict the inappropriate use of military power by the President — in other words, politics was one of the major problems.

But Goldstein did not lay all the blame on internal American political bickering between branches of government. He also discussed other dimensions of the failure to achieve victory in Vietnam, including military shortcomings and broader political failures: the absence of realizable goals, the failure to maintain public support through debate and dialogue, and the failure to recognize that a successful approach to war must integrate military, diplomatic, and humanitarian elements. In the more than forty years since the publication of Goldstein's article, time has proven him correct, and the subsequent American military ventures into Afghanistan and Iraq were undertaken with a markedly different procedural outlook.

Congressional Oversight and the War Powers Resolution

Many claim that the inability of Congress to maintain the checks and balances enshrined in the Constitution was at the core of the problem with Vietnam. Yet this does not mean that Congress was initially opposed to the war. In fact, it was Congress that, in 1964, passed the Southeast Asia Resolution — more commonly known as the Tonkin Gulf Resolution — which "on its face gave the president broad powers" (Ely, 1993, p. 13). Many credit this legislation as the official start of the war, as it authorized the President "to take all necessary measures to repel any armed attack against the forces of the United States and to prevent any further aggression" (Tonkin Gulf Resolution, 1964). The resolution gave the President virtually unlimited power to resolve the crisis then unfolding in Vietnam, and later presidents used it as the legal basis for their authority to wage the war until Congress repealed it in 1971.

In the aftermath of the Vietnam War, Congress moved to limit the President's ability to commit United States military forces without its direct approval. In 1973, Congress passed the War Powers Resolution, which created "a set of procedures for both the President and Congress to follow in situations where the introduction of U.S. forces abroad could lead to their involvement in armed conflict" (War Powers). The resolution stated clearly that the President may only commit U.S. troops if there is a declaration of war, specific congressional authorization, or a national emergency caused by an attack on the United States. It also required the President to consult with Congress before committing forces and to continue consulting regularly during any deployment. Furthermore, the resolution specified that any forces committed by the President must be withdrawn within 60 days unless Congress approved further military action, and that such authorization could be rescinded at any time.

Because the measure was a resolution rather than a bill, it did not require presidential approval, and it has therefore been the subject of ongoing legal controversy regarding its full constitutionality. Nevertheless, it established an important precedent for congressional involvement in military decision-making.

Knowing the Enemy: Historical Context and Strategic Miscalculation

One of the central criticisms of American political and military leadership during Vietnam was the failure to learn the lessons of history — particularly the history of Vietnam itself. The Vietnamese people had resisted foreign rulers for centuries and viewed the United States' involvement as simply another form of foreign domination. The Chinese, Japanese, and French had all failed to subdue the country, and these experiences had forged a powerful national identity and an enduring determination to remain independent. When the Americans became involved, they underestimated both the Vietnamese will and their capabilities.

American generals also applied their own cultural values to the enemy. They commonly believed they could "bleed the North Vietnamese dry through a constant onslaught of firepower," not realizing that the North Vietnamese "were prepared to accept limitless casualties to attain their objective" (Mariney, 1989). The Americans assumed that mounting enemy casualties would lead to surrender — a logic rooted in their own framework for assessing acceptable losses. They lacked a realistic understanding of the enemy's motivations, historical context, and perspective, and thus failed to formulate an effective strategy.

American military strategists now make it a point to know their enemy as objectively as possible. In the War on Terror, which began with the September 2001 attacks on the World Trade Center, understanding the enemy became more critical than ever. The motivations, capabilities, perspectives, and historical contexts of adversaries in Afghanistan and Iraq had to be carefully assessed before committing forces. While many attempted to treat these two conflicts as a single war, they required separate analyses. What worked in Afghanistan did not always apply in Iraq, and by learning from Vietnam, the military worked to maintain an objective view of each adversary and to formulate strategies appropriate to each distinct situation.

Conclusion: Vietnam's Lasting Impact on American Strategy

Vietnam has been a traumatic episode in the history of the United States and Americans are still coming to grips with it. Defeat is not something that people like to accept, and many simply come up with excuses for the defeat. But excuses will not prevent similar failures in the future. Some Americans have invested considerable effort in understanding the root causes of the failure of American policy and strategy in Vietnam, and a general consensus has emerged: there was a fundamental failure of both military and political leadership. The military did not provide accurate assessments, and the political leadership abdicated its responsibility to oversee military operations.

As a direct result, no American president can now order troops into a combat mission for more than 60 days without consulting Congress and securing its support — a structural safeguard ensuring that the nation's political leadership remains engaged in decisions to go to war. There was also the critical mistake made by both civilian and military leaders in their misunderstanding of the enemy — their motivations, historical situation, and true capabilities. Only by understanding the enemy clearly, without the distortion of cultural assumptions, can the military hope to succeed.

Public support, too, has been recognized as a prerequisite for military success. Congress controls military funding, and members of Congress are acutely sensitive to public opinion. If the people do not support a military action, their representatives are unlikely to do so either. The relationship works in both directions: political leadership that speaks with a unified voice can itself generate public support for a military operation. In either case, without the backing of the public, military operations are unlikely to succeed in the long run.

Finally, the military has internalized the strategic lessons Vietnam so painfully taught. It understands that the American public's tolerance for prolonged conflict is limited, that political factors will always intersect with military decision-making, and that firepower alone cannot resolve complex conflicts. Diplomacy, political engagement, and humanitarian operations are legitimate and often superior instruments of national power. The American defeat in Vietnam has had a profound and lasting effect on American society, politics, and military doctrine — and continues to shape how the United States engages with the world today.

References

Ely, J. H. (1993). War and responsibility: Constitutional lessons of Vietnam and its aftermath. Princeton University Press.

Goldstein, W. (1970). The lessons of Vietnam. Bulletin of the Atomic Scientists, 25(2), 41–49.

Larson, E., & Savych, B. (2005). American public support for military operations from Mogadishu to Baghdad. RAND Corporation. Retrieved from

Mariney, C. (1989). Vietnam: Lessons learned. GlobalSecurity.org. Retrieved from http://www.globalsecurity.org/military/library/report/1989/MC.htm

Petraeus, D. H. (1986). Lessons of history and lessons of Vietnam. Parameters. Retrieved from

Tonkin Gulf Resolution. (1964). OurDocuments.gov. Retrieved from http://www.ourdocuments.gov/doc.php?flash=true&doc=98

War Powers — Law Library of Congress. Library of Congress. Retrieved from