The Second Cold War: origins and changing instruments
Explain renewed tension across the late Carter and early Reagan years without treating every disagreement as new in 1981.
Exam scope and assessment notes
Partial 2026 course: introductory context across the twelve AS topics, with selected document workshops, not full AS or A Level preparation. All three Paper 3 alternatives have introductory context, historiography and original interpretation exercises; Italy, Stalin’s Russia, Hitler’s Germany and Britain have introductory depth pathways across their four enquiries. The USA in the late 1940s/1950s and the 1960s/1970s have introductory American depth pathways; the 1980s/early-1990s theme now introduces all four enquiries with original teaching and two longer essay workshops. All four American themes now have introductory teaching and longer essay workshops, including US foreign policy, 1944–1992. The US–Soviet theme introduces all four enquiries through thirty core lessons and two longer essay workshops. Forty-one lessons introduce all four East and Southeast Asia enquiries: eight on post-war change, nine on Korea, twelve on Vietnam and twelve on Sino-American relations. Eight lessons introduce the African independence enquiry through Ghana, Nigeria, Senegal, Kenya and comparative reasoning. Nine further lessons introduce government, economic and social challenges after independence. Thirteen further lessons introduce Cold War involvement, Chinese support, non-alignment and Pan-Africanism. Twelve further lessons introduce UN involvement in Congo and Somalia, with 1993–1995 explicitly labelled as later context beyond the theme’s 1992 endpoint. Ten lessons introduce the creation-of-Israel enquiry. Twenty further lessons introduce wars and peace efforts in 1948–1979. Seventeen further lessons introduce superpower motives, oil, American and Soviet policies and their consequences through 1991. Twenty-one further lessons introduce the Iranian Revolution, Iran–Iraq War and 1990–1991 Gulf War. All four 2026 Middle East enquiries have introductory lessons; broader reading, depth, specialist review and full assessment remain unfinished. The separate 2027–2029 requirements are not mapped by these 2026 lessons. A separately labelled revised-year orientation and Eastern Europe enquiries 7.1–7.4 introductions and South Africa enquiries 8.1–8.3 and Zimbabwe enquiry 8.4, followed by Malaya enquiry 9.1 and introductory sequences for Malaysia formation enquiry 9.2 and Indonesian nationalism enquiry 9.3, with partial preparation, revolution, 1950s challenges and New Order teaching in enquiry 9.4, are available; other revised teaching remains unfinished. Source summaries are original StudyForA paraphrases, not quotations, complete documents or simulated eyewitness sources. Primary documents, historians’ arguments and original exercises are identified separately. Guided source comparisons, interpretation exercises and analytical models are not full papers, calibrated marking or Cambridge grades. Broader authentic source reading, historical depth and subject-specialist review remain required. US foreign policy, 1944–1992 is one theme within the American Paper 4 depth study in 2026. The official paper is 105 minutes and 60 marks, with two questions from the chosen depth study. These lessons and original planning briefs introduce US foreign policy, 1944–1992; broader historical depth, full timed papers and calibrated marking remain unfinished. Develop your own supported judgement using precise evidence, causal relationships and counterarguments. The Paper 4 choice is independent of Paper 3.
Before you begin
- Place events in chronological order
- Distinguish a historical document from a later account and from a student argument
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
How should you begin a depth-study argument?
What you will learn
- Connect the deterioration of détente with several developments
- Distinguish the 1979 NATO decision from later deployments
- Compare rhetoric, military programmes and continuing negotiations
Build a depth-study argument
- Write your own evidence-based answer before opening the model.
- Define the judgement, connect precise examples, consider counterarguments and explain the relative weight of the evidence. The original brief is a planning aid, not a historical source to quote as testimony.
Partial 2026 course: introductory context across the twelve AS topics, with selected document workshops, not full AS or A Level preparation. All three Paper 3 alternatives have introductory context, historiography and original interpretation exercises; Italy, Stalin’s Russia, Hitler’s Germany and Britain have introductory depth pathways across their four enquiries. The USA in the late 1940s/1950s and the 1960s/1970s have introductory American depth pathways; the 1980s/early-1990s theme now introduces all four enquiries with original teaching and two longer essay workshops. All four American themes now have introductory teaching and longer essay workshops, including US foreign policy, 1944–1992. The US–Soviet theme introduces all four enquiries through thirty core lessons and two longer essay workshops. Forty-one lessons introduce all four East and Southeast Asia enquiries: eight on post-war change, nine on Korea, twelve on Vietnam and twelve on Sino-American relations. Eight lessons introduce the African independence enquiry through Ghana, Nigeria, Senegal, Kenya and comparative reasoning. Nine further lessons introduce government, economic and social challenges after independence. Thirteen further lessons introduce Cold War involvement, Chinese support, non-alignment and Pan-Africanism. Twelve further lessons introduce UN involvement in Congo and Somalia, with 1993–1995 explicitly labelled as later context beyond the theme’s 1992 endpoint. Ten lessons introduce the creation-of-Israel enquiry. Twenty further lessons introduce wars and peace efforts in 1948–1979. Seventeen further lessons introduce superpower motives, oil, American and Soviet policies and their consequences through 1991. Twenty-one further lessons introduce the Iranian Revolution, Iran–Iraq War and 1990–1991 Gulf War. All four 2026 Middle East enquiries have introductory lessons; broader reading, depth, specialist review and full assessment remain unfinished. The separate 2027–2029 requirements are not mapped by these 2026 lessons. A separately labelled revised-year orientation and Eastern Europe enquiries 7.1–7.4 introductions and South Africa enquiries 8.1–8.3 and Zimbabwe enquiry 8.4, followed by Malaya enquiry 9.1 and introductory sequences for Malaysia formation enquiry 9.2 and Indonesian nationalism enquiry 9.3, with partial preparation, revolution, 1950s challenges and New Order teaching in enquiry 9.4, are available; other revised teaching remains unfinished. Source summaries are original StudyForA paraphrases, not quotations, complete documents or simulated eyewitness sources. Primary documents, historians’ arguments and original exercises are identified separately. Guided source comparisons, interpretation exercises and analytical models are not full papers, calibrated marking or Cambridge grades. Broader authentic source reading, historical depth and subject-specialist review remain required.
Enquiry brief and analytical model
This is an original StudyForA enquiry brief, not a quotation, a primary document or a historian’s extract. Use it to plan your own argument and read the linked evidence. US foreign policy, 1944–1992 is one theme within the American Paper 4 depth study in 2026. The official paper is 105 minutes and 60 marks, with two questions from the chosen depth study. These lessons and original planning briefs introduce US foreign policy, 1944–1992; broader historical depth, full timed papers and calibrated marking remain unfinished. Develop your own supported judgement using precise evidence, causal relationships and counterarguments. The Paper 4 choice is independent of Paper 3.
StudyForA enquiry brief · The Second Cold War: origins and changing instruments
[1] Compare successive decisions and instruments. Planned deployment and research are not completed outcomes at the moment they are announced.
1. How far did Reagan create the Second Cold War?
Compare after trying
Reagan intensified aspects of confrontation but did not originate every tension. Regional rivalry, rights concerns and doubts about restraint had already weakened détente, and Carter responded to the Soviet invasion of Afghanistan in December 1979. The deterioration should therefore be explained across administrations and through interacting choices.
NATO’s 12 December 1979 dual-track decision preceded Reagan and the later invasion that month. It combined planned modernisation with negotiation and differed from deployments beginning in 1983. Allied governments and public opposition also shaped the setting, making a wholly unilateral American account insufficient.
Early Reagan rhetoric, military programmes and SDI added assertive instruments, but SDI remained research and arms negotiations began before Gorbachev. INF talks in 1981 and START in 1982 qualify claims of no contact. A balanced judgement distinguishes origins, intensification and implementation rather than equating a political label with automatic cancellation of every agreement or delivery of a perfect shield.
Why this response fits
- Uses precise evidence to explain a mechanism and address the question.
- Compares aims, instruments and outcomes while testing alternatives and limits.
Explain deterioration as a process
Détente had never removed regional rivalry, rights disputes or disagreement over strategic intentions. By the late 1970s, doubts about its benefits and confidence in restraint were increasing. The Soviet invasion of Afghanistan in December 1979 intensified American concern and brought responses under Carter before Reagan entered office. A judgement about the Second Cold War should therefore trace a process rather than make the January 1981 inauguration the origin of every tension.
American domestic debate, Soviet choices and allied security concerns interacted. SALT II had been signed but had not entered into force, and the deterioration further obstructed its ratification. That did not mean every earlier agreement disappeared automatically. Compare the status and operation of each arrangement before treating a broad political shift as a legal cancellation of all arms-control commitments.
Separate alliance decisions and implementation
On 12 December 1979, NATO adopted a dual-track approach: planned modernisation of specified intermediate-range forces alongside an offer of arms negotiations. The decision preceded both Reagan’s presidency and the later deployments beginning in 1983. It also preceded the Soviet invasion of Afghanistan later that month, so that invasion cannot be the cause of a decision already made. A causal account must retain this order.
European allies and public opposition mattered to implementation and legitimacy. The United States did not act in an empty continent where every government and citizen held the same view. Soviet SS-20 deployment, concerns about the balance and fears of escalation formed part of the argument, while protests contested whether new deployments improved security. Identify a government’s rationale separately from proof that it was accepted by every affected population.
Compare assertive policy with continued contacts
Reagan’s early approach included stronger anti-Soviet rhetoric, military programmes and the Strategic Defense Initiative announced in March 1983. SDI was a research proposal, not an already operating shield guaranteeing protection. Negotiations also continued: INF talks began in 1981 and START talks in 1982, before Gorbachev’s accession in 1985. The later breakdown and resumption of talks should not erase those earlier efforts. Compare instruments and outcomes rather than assuming that confrontation meant no contact or that a proposed technology had already achieved its advertised capability.
Sources for this lesson
- Cambridge History 9489 · 2026 Version 3 · content pp. 9–41, assessment pp. 43–45, changes p. 52
- Cambridge History 9489 · December 2025 update · 2026 only
- Office of the Historian · selected December 1979 invasion and Carter response; local actors and later withdrawal distinct
- NATO · selected 12 December 1979 dual-track decision and context; alliance account, decision distinct from later deployments
- Reagan, 23 March 1983 · primary defence address, selected research proposal and acknowledged limits; not an operational shield
- Reagan, 17 April 1982 · primary nuclear-weapons radio address, ongoing INF negotiation and planned strategic talks; not measured outcomes
- FRUS 1981–1988 Volume XI preface · selected June 1982 talks, later resumption and research scope; not every document
- Office of the Historian · selected SALT I instruments and limits; SALT II date checked against the original treaty
Pause and explain
Which explanation preserves change and chronology?
Worked example
Can the late-December invasion cause the NATO decision of 12 December?
Show the worked solution
- Place the dates in order.
- Identify earlier security concerns.
- Separate later reinforcement from initial cause.
Answer No. It could affect later attitudes and implementation, but not cause an already adopted decision.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Guided: Explain how Afghanistan intensified an existing deterioration.
Give me a hint
Identify both earlier tensions and the new event.
Compare my reasoning
- Identify an earlier dispute.
- Explain the invasion’s possible significance.
- Retain Carter’s response before Reagan.
Rights, regional and strategic disputes already qualified détente, while the December 1979 invasion sharpened fears about Soviet intentions and encouraged further American responses under Carter. It was an important intensifier rather than the creator of every disagreement, and the sequence prevents all renewed tension being attributed only to Reagan’s later inauguration.
Look for these in your work
- Explains change within a process
- Correct presidential chronology
Independent: Separate NATO’s decision, the invasion and later deployments.
Give me a hint
Use order to test a causal claim.
Compare my reasoning
- Date the 12 December 1979 decision.
- Place the later December invasion.
- Identify implementation from 1983.
NATO adopted the dual-track decision on 12 December 1979, before the Soviet invasion later that month and before Reagan’s presidency. Deployments began later, in 1983. Afghanistan could reinforce subsequent concern, but it cannot explain the initial decision as an event caused by something that had not yet happened.
Look for these in your work
- Correct order
- Tests causation rather than mere association
Application: Correct a fictional account saying no arms talks existed before Gorbachev and SDI already blocked every missile.
Give me a hint
Distinguish negotiations and proposed capability.
Compare my reasoning
- Date INF and START openings.
- Identify SDI’s research status.
- Separate aims from delivery.
INF negotiations began in 1981 and START talks in 1982, before Gorbachev became leader in 1985. SDI, announced in March 1983, was a research initiative rather than an operating shield. Confrontational language therefore did not mean no contact, and a technological aspiration cannot be treated as an already delivered defence.
Look for these in your work
- Correct negotiation chronology
- Correct proposal/capability distinction
Common mistakes
- Dating every deterioration to Reagan’s inauguration
- Merging a 1979 decision and 1983 deployment
- Calling SDI an operational shield or erasing early negotiations
What can you explain now?
Which explanation preserves change and chronology?
Compare with the explanation
Compare late-1970s tensions, Carter’s response, alliance decisions and Reagan’s instruments
It traces a developing process without projecting later events backwards.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
Which explanation preserves change and chronology?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.