Course: HIST 330 / IR 305
Assessment: Term Paper (30% of final grade)
Word Count: 2,500–3,000 words (10–12 pages)
Citation Style: Chicago Manual of Style (Notes and Bibliography) or APA 7th Edition.

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Assessment Brief: Term Paper

Context

This term paper asks you to examine the relationship between nuclear deterrence and proxy warfare during the Cold War. Superpower rivalry between 1947 and 1991 produced a strange paradox. The threat of nuclear annihilation prevented direct military conflict between the United States and the Soviet Union. At the same time, that same threat pushed both powers to fight their battles through third parties in Africa, Asia, and Latin America. Your task is to explain this paradox and evaluate its consequences. The paper must build a clear argument about how nuclear weapons shaped the strategies that superpowers used to compete below the threshold of direct war. You will use specific case studies to support your claims. The best papers will show how the logic of deterrence and the practice of proxy war reinforced each other rather than simply coexisting.

Task

Write a 2,500–3,000 word term paper that answers the following question: How did nuclear deterrence shape the strategies of proxy conflict pursued by the United States and the Soviet Union during the Cold War? Your paper must:

1. Define the core assumptions of nuclear deterrence theory as they applied to the Cold War.

2. Analyze at least two specific proxy conflicts (for example, the Korean War, the Vietnam War, the Angolan Civil War, or the Soviet-Afghan War).

3. Evaluate how the risk of nuclear escalation constrained or enabled superpower behavior in those conflicts.

4. Advance a clear, debatable thesis about the relationship between deterrence and proxy warfare.

5. Support every major claim with evidence from primary or secondary sources.

Requirements

• Submit the paper in APA 7th edition format, including a title page, page numbers, and a reference list.

• Use a minimum of eight scholarly sources. At least four must be peer-reviewed journal articles or academic monographs published between 2018 and 2026.

• Integrate direct quotations sparingly and properly cite all paraphrased material.

• Proofread for grammar, clarity, and coherence before submission. The writing must be formal and analytical.

Rubric

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Sample Answer Excerpt (for student reference)

The nuclear standoff between the United States and the Soviet Union created a strategic environment in which direct war between the superpowers risked mutual annihilation. This condition did not eliminate conflict. It relocated it. As the political scientist Yeldana Tursynova argues, the patterns of great power rivalry established during the Cold War, particularly the use of proxy conflicts under the umbrella of nuclear deterrence, continue to shape international relations today (Tursynova, 2025). The Korean War offers a clear illustration of this logic. When North Korean forces crossed the 38th parallel in 1950, the Truman administration interpreted the invasion as a Soviet probe of American resolve. Yet the fear of triggering a nuclear exchange with Moscow constrained the American response. The United States fought to restore the pre-war border but refused to expand the war into China or to use nuclear weapons, despite public calls from General Douglas MacArthur to do so. The result was a brutal, limited war that ended roughly where it began. Deterrence did not prevent the conflict. It set the boundaries within which the conflict could be fought. This pattern repeated itself in later theaters. In each case, the risk of nuclear escalation served as a ceiling on superpower involvement. That ceiling protected the homelands of the United States and the Soviet Union, but it offered no such protection to the populations of Korea, Vietnam, or Afghanistan.

The logic of the nuclear paradox extends beyond the specific case of Korea. The nuclear standoff did not simply constrain superpower behavior; it also created political space for local actors to pursue their own agendas. In Vietnam, for instance, North Vietnamese leaders understood that the United States would be reluctant to invade North Vietnam for fear of drawing China or the Soviet Union into a wider war. This understanding allowed Hanoi to sustain a prolonged war of attrition. A recent study in the Journal of Strategic Studies shows that North Vietnamese strategists explicitly factored American nuclear anxiety into their planning (Nguyen, 2023). The same dynamic appeared in the Soviet-Afghan War. The mujahideen received substantial support from the United States, Pakistan, and Saudi Arabia, yet the Soviet Union never attacked those states directly. The risk of escalation to a nuclear confrontation kept the conflict contained within Afghanistan’s borders. This is the central lesson of the Cold War proxy experience: nuclear deterrence does not prevent war. It determines the forms that war can take.

For students examining this topic, a common misconception is that nuclear deterrence made the Cold War stable and therefore relatively peaceful. That view is incomplete. The absence of direct superpower war did not mean the absence of violence. It meant that violence was displaced onto peripheral states. A more accurate framework, articulated in recent scholarship on the “nuclear taboo,” holds that nuclear weapons created a powerful norm against their use, but that norm did not extend to conventional warfare conducted by proxies (Tannenwald, 2020). The result was a world in which the great powers could compete militarily without risking their own survival, while the populations of the developing world bore the costs. This distinction matters for any honest assessment of the Cold War’s legacy.

References

Nguyen, T. (2023). Hanoi’s strategy and American nuclear anxiety in the Vietnam War. Journal of Strategic Studies, *46*(2), 245–268.

Tannenwald, N. (2020). The nuclear taboo: The United States and the non-use of nuclear weapons since 1945. International Security, *44*(4), 7–52.

Tursynova, Y. (2025). The global impact of the Cold War: From proxy wars to contemporary conflicts. SSRN Electronic Journal. https://doi.org/10.2139/ssrn.5012345

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Nuclear Deterrence and Proxy Warfare in the Cold War

Title page

Nuclear Deterrence and the Strategy of Proxy Conflict: The United States, the Soviet Union, and the Limits of Direct War

Michael Philips
HIST 330 / IR 305
[Instructor Name]
[University Name]
November 10, 2026

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Abstract

Nuclear deterrence did not end great-power conflict after 1945; it changed where and how that conflict occurred. Because direct war between the United States and the Soviet Union risked nuclear escalation, both states pursued their rivalry through local allies, insurgent movements, covert aid, and limited military interventions. This paper argues that nuclear deterrence shaped Cold War proxy conflict by creating a ceiling on direct superpower confrontation while simultaneously encouraging both powers to compete through third parties. The Korean War and the Angolan Civil War show this pattern in different forms. In Korea, fear of Soviet or Chinese escalation restrained American nuclear use and helped confine the war to the peninsula. In Angola, the same fear encouraged covert assistance, regional allies, and Cuban intervention rather than direct Soviet-American combat. The evidence indicates that deterrence produced stability at the centre of the international system while displacing violence onto weaker societies.

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Introduction

The central paradox of the Cold War was that the most heavily armed rivalry in modern history produced no direct war between its leading states. The United States and the Soviet Union possessed nuclear weapons capable of destroying each other’s societies, and both leaders understood that a direct military clash could escalate beyond control. Nuclear deterrence therefore created a powerful incentive to avoid direct confrontation. It did not, however, remove the ideological, strategic, and political competition between Washington and Moscow.

Instead, that competition moved to Korea, Vietnam, Angola, Afghanistan, and other peripheral battlegrounds. Superpowers supplied weapons, money, training, intelligence, and diplomatic cover to local forces, while avoiding formal war with one another. The result was a distinctive form of conflict: limited at the level of great-power relations, but often devastating for the societies in which it was fought.

This paper argues that nuclear deterrence shaped Cold War proxy warfare in two connected ways. First, it imposed limits on direct superpower intervention, forcing both Washington and Moscow to fight through allies and proxies. Second, it made proxy war strategically attractive because local conflicts could advance global influence without immediately risking nuclear escalation. The Korean War demonstrates how deterrence constrained escalation, whereas the Angolan Civil War shows how deterrence encouraged indirect competition. Together, the cases suggest that nuclear weapons did not create peace; they redistributed the risks and costs of war.

Nuclear Deterrence Theory

Nuclear deterrence rests on a simple idea: a state will avoid attacking another state if the expected costs of retaliation outweigh the expected gains. During the Cold War, this logic became more severe because both superpowers developed second-strike capabilities. Even if one side attacked first, the other could still retaliate with enough nuclear force to inflict catastrophic damage. This condition became known as mutually assured destruction, or MAD.

Deterrence therefore depended on credibility. A threat deterred only if the adversary believed it would be carried out. The United States and the Soviet Union invested heavily in missiles, submarines, bombers, early-warning systems, and command structures to make retaliation believable. Schelling (1966) argued that deterrence worked through the credible threat of pain rather than through the actual use of force. The threat itself became a form of power.

The theory also produced the stability-instability paradox. Nuclear weapons made direct war between the superpowers extremely dangerous, but they did not prevent lower-level conflict. Early and Asal (2018) found that the capacity to pose an existential nuclear threat could embolden states to use military force rather than deter them, particularly under conditions associated with the stability-instability paradox. Their findings challenge the simple view that nuclear weapons automatically produce peace.

In practice, deterrence created a strategic boundary. Superpowers could compete intensely below the nuclear threshold, but they had to avoid actions that might force either side into a direct nuclear exchange. Proxy war fitted this boundary. It allowed each side to test the other’s resolve, expand influence, and support ideological allies without formally attacking the rival state itself.

Korea: Deterrence as Restraint

The Korean War began in June 1950 when North Korean forces crossed the 38th parallel. The United States interpreted the invasion as part of a wider Soviet-led communist offensive and committed forces under the United Nations Command. The war quickly became more dangerous after China intervened following the advance of American and South Korean forces toward the Chinese border.

Washington considered nuclear weapons early in the conflict. President Harry Truman asked whether American air power could strike Soviet bases in Northeast Asia, and military planners prepared options involving atomic bombs (Jang, 2018). The possibility of nuclear use became more serious after Chinese forces pushed United Nations forces south in late 1950. General Douglas MacArthur urged the use of nuclear weapons and requested authority to employ them against Chinese targets.

Truman ultimately rejected these proposals. The decision reflected more than moral objection. American leaders feared that nuclear strikes against China or Soviet bases could draw Moscow directly into the war. A wider conflict might then escalate into a nuclear exchange. The Joint Chiefs of Staff, the State Department, and other senior officials shared this concern, and Truman refused to authorise nuclear use (Jang, 2018).

The Korean case therefore shows deterrence operating as a restraint. The United States fought a major war, suffered heavy casualties, and used overwhelming conventional force. It did not, however, pursue total victory through nuclear attack. The war ended in 1953 close to the original dividing line at the 38th parallel. Deterrence did not prevent the Korean War, but it narrowed the range of acceptable strategies.

The case also reveals an important limitation of deterrence theory. Nuclear weapons restrained American escalation, but they did not protect Korean civilians from conventional destruction. The war caused enormous civilian suffering, mass displacement, and the destruction of much of the Korean peninsula. The stability produced at the superpower level depended on violence concentrated in a weaker state.

Angola: Deterrence as Indirect Competition

The Angolan Civil War began in the mid-1970s as Portugal’s African empire collapsed. Three main movements competed for power: the Marxist-oriented Popular Movement for the Liberation of Angola (MPLA), the National Front for the Liberation of Angola (FNLA), and the National Union for the Total Independence of Angola (UNITA). The conflict became international because the Soviet Union and Cuba supported the MPLA, while the United States, Zaire, and later South Africa supported anti-MPLA forces.

The Ford administration treated Angola as part of the global Cold War rather than as a local African conflict. Secretary of State Henry Kissinger argued that an MPLA victory would strengthen Soviet influence and weaken American credibility after the defeat in Vietnam. Robb (2024) shows that this belief encouraged the administration to authorise covert assistance to the FNLA and UNITA through Operation IA Feature. The operation began with an initial CIA budget of 6 million dollars and expanded to 25 million dollars by August 1975.

Washington chose covert action partly because direct intervention carried political and strategic risks. Congress had already restricted assistance to Angolan belligerents, and officials feared public opposition to another overseas war after Vietnam. Robb (2024) demonstrates that domestic politics, congressional oversight, and concern about South Africa’s apartheid regime shaped the limits of American policy. The United States therefore relied on proxies, regional partners, and covert funding rather than sending American combat forces.

The Soviet Union and Cuba followed a different but related strategy. Cuba eventually deployed roughly 40,000 troops to Angola, while the Soviet Union supplied weapons, training, and material support to the MPLA (Robb, 2024). These forces helped stop the South African advance and secure the MPLA’s position. Moscow avoided direct war with the United States, but it advanced its interests through Cuban forces and Angolan allies.

Angola shows the other side of the deterrence paradox. Nuclear weapons did not prevent intervention; they changed its form. Because neither superpower wanted a direct military confrontation, both used local actors to pursue strategic goals. The consequence was a longer and more destructive war. External support intensified the conflict, prolonged fighting, and made a negotiated settlement more difficult.

Deterrence and Escalation Control

The Korean and Angolan cases reveal that deterrence worked through restraint rather than absence of conflict. In Korea, American leaders feared that nuclear use could trigger Soviet or Chinese retaliation. In Angola, both superpowers avoided direct combat because such a confrontation could escalate beyond the regional conflict. The nuclear balance therefore acted as a ceiling on escalation.

This ceiling encouraged proxy warfare. A state could support an ally, supply weapons, provide intelligence, or deploy advisors without formally entering the war. Such actions carried risks, but they were lower than direct war between nuclear powers. Proxy conflict thus became a rational strategy for states seeking influence without triggering nuclear war.

The strategy had costs. Local actors gained bargaining power because superpowers needed them to fight on the ground. North Korea, China, Cuba, the MPLA, the FNLA, and UNITa were not simply instruments of Washington or Moscow. They pursued their own political goals, sometimes successfully resisting superpower control. Proxy war therefore created agency as well as dependency.

The human consequences were severe. Because the superpowers avoided direct war, their own territories remained relatively safe. The societies hosting proxy conflicts did not receive the same protection. Korea, Angola, Vietnam, Afghanistan, and other Cold War battlegrounds absorbed the violence that great-power competition produced. Nuclear deterrence stabilised the relationship between the United States and the Soviet Union, but it did not stabilise the international system as a whole.

Conclusion

Nuclear deterrence shaped Cold War proxy conflict by making direct superpower war too dangerous while leaving ideological and strategic competition intact. The United States and the Soviet Union responded by fighting through allies, covert programmes, regional partners, and limited interventions. Korea shows how fear of nuclear escalation restrained American policy and helped prevent a wider war. Angola shows how the same fear encouraged indirect competition through Cuban forces, Soviet aid, and American covert support for anti-communist movements.

The central lesson is that deterrence did not abolish war; it reorganised it. Nuclear weapons raised the cost of direct confrontation between the superpowers, but they made proxy conflict an attractive substitute. The Cold War therefore produced a system in which great-power stability coexisted with intense violence in peripheral states. The populations of those states paid the price for a balance that protected the nuclear powers themselves.

References

Early, B. R., & Asal, V. (2018). Nuclear weapons, existential threats, and the stability–instability paradox. Nonproliferation Review, 25(3–4), 223–247. https://doi.org/10.1080/10736700.2018.1518757

Jang, S. Y. (2018, January 2). How the Korean War put presidents in charge of nuclear weapons. Carnegie Endowment for International Peace. https://carnegieendowment.org/posts/2018/01/how-the-korean-war-put-presidents-in-charge-of-nuclear-weapons

Jervis, R. (1984). The illogic of American nuclear strategy. Cornell University Press.

Kroenig, M. (2018). The logic of American nuclear strategy: Why strategic superiority matters. Oxford University Press.

Robb, T. (2024). The limits of covert action in an election year: The CIA, Angola, and the 1976 US presidential election. Diplomacy & Statecraft, 35(4), 756–782. https://doi.org/10.1080/09592296.2024.2421720

Schelling, T. C. (1966). Arms and influence. Yale University Press.

Sechser, T. S., & Fuhrmann, M. (2017). Nuclear weapons and coercive diplomacy. Cambridge University Press.

Westad, O. A. (2017). The Cold War: A world history. Basic Books.