War : Iran–Iraq War (1980–1988) Chapter 04. Termination

Part 4 — Termination (Iran–Iraq War, 1980–1988)

1) What “termination” meant in this war

FACTS. The Iran–Iraq War did not end in 1988 with a signed bilateral peace treaty that resolved all outstanding issues. Instead, active combat ended through a UN-brokered ceasefire framework centered on UN Security Council Resolution 598 (20 July 1987), followed by UN-supervised monitoring, indirect/direct talks, and—only later—partial progress on prisoners of war (POWs), border issues, and formal claims of responsibility.

INTERPRETATION (attributed). Some analysts treat this as a classic “ceasefire-first” termination in which stopping the fighting was achievable sooner than a comprehensive political settlement; others emphasize that the absence of a comprehensive settlement left key disputes to be managed (or deferred) for years. This is best read as a sequenced termination: ceasefire → monitoring → bargaining over withdrawals/POWs/border → later political/legal positioning about responsibility. (Confidence: High that this sequencing describes the process; Medium on how much weight to assign each causal driver.)


2) The ceasefire framework: UNSC Resolution 598 (20 July 1987)

FACTS (core provisions). UNSC Resolution 598:

  • Demanded an immediate ceasefire and cessation of military actions, and withdrawal to internationally recognized boundaries.
  • Requested UN observers to verify and supervise the ceasefire and withdrawal.
  • Urged the release and repatriation of POWs “without delay” after cessation of active hostilities, referencing the Third Geneva Convention.
  • Requested the Secretary-General to explore an impartial inquiry into responsibility for the conflict and report to the Security Council.

FACTS (legal/UN framing). The resolution stated the Council was acting under Articles 39 and 40 and determined there existed a breach of the peace regarding the conflict.

INTERPRETATION (attributed). A recurrent critique in the literature is that 598 offered a workable “package” but (by design) postponed the most politically charged items—especially responsibility and reparations—to later processes, which made acceptance more feasible while also enabling later disputes about sequencing and compliance. (Confidence: Medium; this is a common analytic reading, but the relative importance varies by author.)


3) Late-war diplomacy and the “acceptance” problem

FACTS. In the years after 598’s adoption, the ceasefire did not take effect immediately; acceptance and implementation became a bargaining arena in its own right. The resolution’s design created multiple “moving parts” (ceasefire, withdrawal, observers, POWs, responsibility inquiry), and each could be treated as linked or separable by the parties in negotiations.

FACTS (chemical weapons and UN signaling). In May 1988, UNSC Resolution 612 condemned the continued use of chemical weapons in the conflict and called for strict observance of the 1925 Geneva Protocol, reflecting escalating international concern over prohibited weapons use.

INTERPRETATION (attributed). In UN-focused accounts, a key story is the Secretary-General’s “good offices” plus great-power coordination in the Security Council gradually producing a ceasefire window by mid-1988. One academic case study emphasizes how UN diplomacy and Security Council dynamics were central to making a ceasefire operational by August 1988. (Confidence: Medium; UN diplomacy clearly mattered, but it is difficult to disentangle from battlefield and economic pressures.)


4) July–August 1988: from acceptance to “D-Day” ceasefire

FACTS (Iran’s acceptance). A reproduced Iranian Foreign Ministry statement (contained in an ICRC casebook compilation of relevant documents) describes Iran’s “official and unconditional” acceptance of Resolution 598 as occurring 17 July 1988.

FACTS (Iraq’s acceptance; ceasefire announcement). A detailed study of UN settlement efforts reports that on 6 August 1988 Iraq’s UN ambassador declared Iraq’s acceptance of the ceasefire, and that after Security Council consultations the Secretary-General announced a ceasefire date of 20 August 1988 (“D-Day”).

FACTS (talks and monitoring). The same account reports that the Secretary-General announced the start of direct talks on 25 August 1988 in Geneva, and describes the subsequent UN observer mission (UNIIMOG) as central to monitoring and stabilizing the ceasefire line.

INTERPRETATION (carefully bounded).

  • One explanation emphasizes that the war ended when both sides recognized that continued large-scale offensives were unlikely to produce decisive victory at acceptable cost; UN mediation then provided a face-saving procedural route to stop fighting. (Confidence: Medium.)
  • Another emphasizes that institutional design—a ceasefire mechanism plus observers plus deferred responsibility inquiry—made it possible for both sides to accept an outcome short of maximal political aims. (Confidence: Medium.)

5) Enforcement and implementation: what changed quickly vs slowly

A) Ceasefire stabilization

FACTS. UN monitoring mechanisms were explicitly provided for in Resolution 598 (observers to verify and supervise ceasefire and withdrawal).
FACTS. The UN-focused case study indicates UNIIMOG’s mandate later expired on 28 February 1991 after repeated extensions, with a shift to smaller civilian UN offices thereafter.

INTERPRETATION (attributed). Many UN peacekeeping analyses treat this as a comparatively effective observer mission in its narrow task (ceasefire monitoring), even though broader political settlement lagged. (Confidence: Medium; effectiveness depends on the metric—ceasefire stability vs comprehensive settlement.)

B) Withdrawal, linkage, and sequencing disputes

FACTS (sequencing controversy). The document set reproduced in the ICRC casebook includes Iranian arguments that withdrawal to internationally recognized boundaries had legal and practical priority as part of the “first step” demanded by Resolution 598, and alleges Iraq introduced “pre-conditions” that delayed implementation in practice.

INTERPRETATION (with confidence). This reflects a common termination-pathology: once active combat stops, the incentives to concede on boundary/withdrawal details can weaken, and each side may seek leverage through linkage (e.g., withdrawal ↔ POWs ↔ political claims). Confidence: Medium (pattern is common; exact motivation in this case varies by source and is contested).

C) Prisoners of war: delayed mass repatriation, later closure

FACTS (large repatriations). An ICRC case study describes high-volume POW repatriations in late August–September (including daily overland transfers and flights), noting ICRC registration and voluntariness checks during returns.

FACTS (1990 turning point). A contemporary report (Washington Post, 15 August 1990) describes Iraq offering major concessions: recognition of disputed borders, release of war prisoners, and troop withdrawals from Iranian territory—characterizing it as near-total acceptance of Iran’s peace terms, in the context of Iraq’s Kuwait crisis.

FACTS (later closure of POW file). The ICRC has stated (FAQ page, 2025) that the Iran–Iraq POW file is officially closed by both governments and that the last prisoner exchange took place in 2003 under ICRC supervision.

INTERPRETATION (bounded). The record here supports a strong distinction between ending combat (1988) and resolving humanitarian legacies (POWs/missing) over a much longer arc. (Confidence: High.)


6) Victory criteria vs results: what “ending the war” delivered

FACTS (what 598 operationalized). The immediate termination package prioritized: stop fighting, return forces to internationally recognized borders, establish monitoring, and address POWs—while leaving responsibility and other “outstanding issues” to subsequent negotiation/UN processes.

FACTS (1990 border/Algiers reversion signaling). Encyclopaedia Iranica reports that on 14 August 1990 Iraq “appeared to agree” to revert to the 1975 Algiers Treaty border principle (thalweg in the Shatt al-Arab) and withdraw from border pockets, and notes resumed POW exchanges soon after.
A contemporaneous journalistic account describes Iraq offering to recognize disputed pre-war borders and release prisoners, framing it as enabling a formal peace treaty pathway even after the 1988 ceasefire.

FACTS (responsibility finding, late). Encyclopaedia Iranica notes Iran viewed itself as “vindicated” by the UN Secretary-General’s 9 December 1991 report referencing Iraq’s aggression against Iran (UN document S/23273, described there by title).

INTERPRETATION (with confidence levels).

  • From a strict “war aims achieved” lens, the end-state looks closest to stalemate with reversion toward recognized boundaries and gradual postwar bargaining, rather than decisive victory for either side. (Confidence: Medium–High, because “victory” depends on which stated aims are prioritized.)
  • From a “termination stability” lens, the ceasefire held sufficiently to prevent full-scale resumption, but unresolved issues (POWs/missing, responsibility narratives, compensation) prolonged diplomatic contention. (Confidence: High.)

Timeline (Termination-focused milestones)

  1. 20 Jul 1987 — UNSC adopts Resolution 598, demanding ceasefire + withdrawal + UN observers + POW repatriation + responsibility inquiry.
  2. 9 May 1988 — UNSC adopts Resolution 612, condemning continued chemical weapons use.
  3. 17 Jul 1988 — Iran’s leadership accepts Resolution 598 (as described in reproduced Iranian statement).
  4. 6 Aug 1988 — Iraq conveys acceptance of the ceasefire (reported in UN-settlement study).
  5. 8 Aug 1988 — UN Secretary-General announces ceasefire date 20 Aug 1988 (“D-Day”).
  6. 20 Aug 1988 — Ceasefire takes effect (per UN-settlement study’s account of D-Day implementation).
  7. 25 Aug 1988 — Direct talks begin in Geneva (reported in UN-settlement study).
  8. 15 Aug 1990 — Iraq publicly offers major peace concessions (borders/POWs/withdrawal), as reported contemporaneously.
  9. Aug–Sep (early 1990s) — Large-scale POW repatriations under ICRC procedures (documented by ICRC case study).
  10. 28 Feb 1991 — UNIIMOG mandate expires (per UN-settlement study).
  11. 9 Dec 1991 — UN SG report (S/23273) referenced as citing Iraq’s aggression (as summarized by Iranica).
  12. 2003 — ICRC states the last Iran–Iraq prisoner exchange occurred in 2003 and the POW file is now closed.

What is well-established vs what is disputed

Well-established (high confidence)

  • The text and structure of UNSC Resolution 598 (ceasefire, withdrawal, observers, POW repatriation, responsibility inquiry request).
  • The UN-announced ceasefire timing in August 1988 and the opening of Geneva talks shortly thereafter (as documented in UN-settlement scholarship).
  • That large-scale POW repatriations occurred under ICRC supervision and that the POW file was closed with the last exchange in 2003 (per ICRC).

Disputed / contested (medium-to-low confidence, depending on item)

  1. Primary driver of acceptance (Iran, July 1988): exhaustion/battlefield dynamics vs diplomatic package design vs internal political calculations. Evidence exists for all as contributing factors; weighting is contested. (Confidence: Medium.)
  2. Sequencing obligations (withdrawal vs POW repatriation vs talks): parties advanced incompatible readings; documentary exchanges show explicit argument over priority and linkage. (Confidence: High that sequencing was contested; Low–Medium on which reading best captures each side’s internal decision logic.)
  3. Extent/timing of “full” withdrawal compliance post-1988: sources describe delays and bargaining; precise compliance timelines are harder to standardize without a single authoritative audit. (Confidence: Medium.)
  4. Meaning and practical impact of the 1991 responsibility reference (S/23273): Iranica reports Iran felt vindicated; how decisive this was for legal claims or reparations remains debated in scholarship and diplomacy. (Confidence: Medium.)
  5. How “durable” the settlement was: ceasefire durability is clearer than durability of political normalization; cross-border tensions and unresolved files persisted for years. (Confidence: High for asymmetry; “durability” depends on definition.)

Key Sources Used

  • UNSC Resolution 598 (1987) (text) — ceasefire/withdrawal/POWs/responsibility inquiry framework.
  • Peter Bardehle (1992), The Role of the United Nations in the Settlement of the Iran-Iraq War, 1980–88 — detailed ceasefire diplomacy chronology (Aug 1988), Geneva talks, UNIIMOG timeline.
  • UNSC Resolution 612 (1988) (text) — chemical weapons condemnation context during termination phase.
  • ICRC case study on POW repatriations — operational detail on repatriation processes/voluntariness/scale.
  • ICRC FAQ (2025) — POW file closure and last exchange (2003).
  • Washington Post (15 Aug 1990) — contemporaneous reporting on Iraq’s 1990 peace offer (borders/POWs/withdrawal).
  • Encyclopaedia Iranica (“Gulf War and Persia”) — summarizes 1990 concessions and notes 1991 UN SG report reference; also mentions POW exchange scale.

Open Questions / Uncertainties (for Part 4)

  1. Compliance audit: What is the best single, cross-validated timeline of post-ceasefire withdrawals and remaining “pockets,” using UN reporting and independent border documentation? (Confidence in currently-available summary here: Medium.)
  2. POW/missing reconciliation: Even with POW file closure, how complete is accounting for missing persons, and what bilateral/ICRC mechanisms were most consequential?
  3. Responsibility and reparations: How did the 1991 UN SG reference (S/23273) translate (or fail to translate) into concrete reparations mechanisms, if at all, given later regional crises?
  4. Role of chemical weapons in termination bargaining: Beyond UNSC 612’s condemnation, what is the best-supported causal assessment (with attribution) of how CW use affected the timing of acceptance and ceasefire conditions?