SALT II: signature, ratification and political restraint
Explain why an agreement can influence conduct without entering into force, and why later tension did not erase every negotiating channel.
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–Soviet relations, 1950–1991 is one theme within the International 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–Soviet relations, 1950–1991; 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
- Distinguish SALT II signature, legal status and conduct
- Explain political obstacles with dated evidence
- Evaluate renewed tension alongside continued bargaining
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–Soviet relations, 1950–1991 is one theme within the International 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–Soviet relations, 1950–1991; 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 · SALT II: signature, ratification and political restraint
[1] Original planning brief. Explain why an agreement can influence conduct without entering into force, and why later tension did not erase every negotiating channel. Compare the evidence, its provenance and its limits. This brief is not contemporary testimony or a historian’s extract. Write an argument before opening the analytical model.
1. Evaluate renewed tension alongside continued bargaining. Explain your judgement using precise evidence and a counterargument.
Compare after trying
SALT II’s significance depends on separating stages. The treaty was signed on 18 June 1979, but never entered into force. Signature established agreement on a proposed set of strategic limits, while political restraint based on those limits remained a question of declarations and conduct. Neither ratified legal effect nor the complete absence of influence follows automatically from the ceremony.
Domestic concerns about verification and strategic balance made ratification contested before the invasion of Afghanistan further weakened confidence in December 1979. These pressures should be linked to political decisions rather than treated as one universal motive. Renewed confrontation also did not eliminate all bargaining: intermediate-range negotiations and the start of strategic talks in 1982 preceded Gorbachev. Overall, SALT II reveals the fragility of negotiated restraint when legal approval and political trust do not follow agreement on a text. Its limits and aftermath require evidence from separate legal, policy and implementation records, and the continuing negotiating channels qualify a simple story of cooperation ending completely until 1985.
Why this response fits
- Connects dated evidence to a mechanism of change or continuity.
- Distinguishes an actor’s claim, an observed action and the limits of the conclusion.
Keep signature and legal effect separate
Carter and Brezhnev signed SALT II in Vienna on 18 June 1979. Use the date in the original treaty signature block rather than a conflicting abbreviated overview. The agreement sought further limits on specified strategic offensive systems, with definitions and counting rules. Its signature recorded agreement on a text, but SALT II never entered into force. It must not be listed as a ratified treaty whose full legal obligations began at the ceremony.
Ratification and political restraint are different questions. A government could declare an intention to observe limits while the treaty lacked entry into force. Such restraint could still affect expectations and conduct, but its existence, duration and conditions require evidence of policy and implementation. The safe conclusion is neither that in-force treaty obligations existed nor that an unratified text was incapable of political influence.
Explain the political obstacles
Domestic debate involved confidence in verification, the balance of forces and the relationship between restraint and wider security. Claims about compliance and military advantage were political arguments to be evaluated, not automatically neutral findings. Opposition cannot be reduced to one identical motive shared by every senator or citizen. A causal explanation needs to connect a concern to a decision, rather than simply naming a disagreement.
The Soviet invasion of Afghanistan in December 1979 further damaged relations and the prospects for American ratification. Meanwhile NATO’s dual-track decision combined preparation for deployment with pursuit of negotiation over intermediate-range systems. The latter was a different process from SALT II’s strategic limits. Distinguish the instrument, the weapons category and the decision date before placing events in a single narrative of renewed tension.
Recognise competition alongside continued negotiation
Renewed confrontation did not mean that every arms discussion stopped until Gorbachev took office in 1985. Reagan’s April 1982 address referred to ongoing intermediate-range negotiations and plans for strategic talks. The START negotiating record begins in June 1982, with later interruptions and resumption. These are evidence of distinct channels continuing within a hostile relationship, not evidence that a treaty had already been completed.
SALT II therefore illustrates the gap between negotiated text, legal status and practical conduct. Students should make three separate claims and test each with the right evidence. The treaty establishes its proposed rules; ratification records establish legal stages; policy declarations and force records address restraint and implementation. Broader Soviet and American accounts, domestic records and specialist assessment remain needed to weigh why agreement proved fragile and how much influence its limits retained.
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
- SALT II, 18 June 1979 · primary treaty and signature block, selected definitions; signature is not entry into force
- Office of the Historian · selected incentives and rivalry during détente; compressed early-1980s no-talks claim not adopted
- NATO · selected 12 December 1979 dual-track decision and context; alliance account, decision distinct from later deployments
- 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
Pause and explain
Which account best handles the early 1980s?
Worked example
Did SALT II enter into force when it was signed?
Show the worked solution
- Identify the June 1979 signature.
- Check entry separately.
- Distinguish political restraint from legal commencement.
Answer No. It was signed on 18 June 1979 but never entered into force; policy restraint is a separate historical question.
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 SALT II’s legal status without erasing its political significance.
Give me a hint
Separate agreement on a text from entry and conduct.
Compare my reasoning
- Give the signature date.
- State that entry did not occur.
- Explain why declared restraint needs separate evidence.
SALT II was signed on 18 June 1979 but never entered into force. This prevents describing the signature ceremony as the start of ratified treaty obligations. Governments could nevertheless use its limits as a basis for political restraint, which might influence expectations or deployments. Such influence must be shown through policy and conduct records rather than assumed from either signature or the absence of ratification alone.
Look for these in your work
- States signature and lack of entry accurately
- Separates legal status from conduct
Independent: Explain how Afghanistan affected an already contested arms agreement.
Give me a hint
Connect an event to confidence and political prospects.
Compare my reasoning
- Identify existing domestic concerns.
- Place the invasion in December 1979.
- Explain the added obstacle without making it the only prior cause.
SALT II already faced debate over verification and strategic balance. The December 1979 invasion of Afghanistan further damaged confidence in Soviet policy and American ratification prospects. It therefore intensified an existing political problem rather than creating every earlier objection. A supported answer traces how the event affected decisions and separates attributed allegations from established conduct, while recognising that different opponents could have different reasons.
Look for these in your work
- Links the event to a mechanism
- Avoids erasing earlier disagreement
Application: Correct the claim that failed ratification meant no negotiation until 1985.
Give me a hint
Use the chronology of separate negotiating channels.
Compare my reasoning
- Separate SALT II from INF and START talks.
- Identify the 1982 strategic negotiating start.
- Explain why hostile relations can contain bargaining.
Failure to bring SALT II into force did not end every negotiating channel. Intermediate-range discussions were underway before Gorbachev, and strategic reduction talks began in June 1982. There were interruptions and later resumption, so the account should describe those stages rather than a single period without talks. Competition and bargaining could coexist because rivals retained an interest in limiting risks and costs despite wider confrontation.
Look for these in your work
- Distinguishes processes and dates
- Explains coexistence of bargaining and tension
Common mistakes
- Using the wrong signature date
- Calling SALT II an in-force ratified treaty
- Erasing all talks before 1985
What can you explain now?
Which account best handles the early 1980s?
Compare with the explanation
Strategic talks began in 1982 despite confrontation, with interruptions and later resumption
Relations could contain negotiation and competition at the same time.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
Which account best handles the early 1980s?
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.