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Armenia-Azerbaijan — Post-Karabakh and the South Caucasus Realignment: Strategic Assessment

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Armenia-Azerbaijan — Post-Karabakh and the South Caucasus Realignment

Bottom Line Up Front (BLUF)

The September 2023 Azerbaijani offensive, which dissolved the unrecognized Republic of Artsakh in 24 hours and triggered the exodus of essentially the entire ethnic Armenian population (≈100,000 people) from Nagorno-Karabakh, terminated a three-decade territorial dispute on Baku’s terms and forced a structural reordering of the South Caucasus. As of mid-2026, Armenia and Azerbaijan have initialed a peace treaty text but have not signed it; the unresolved sticking points are the Zangezur (Syunik) corridor, constitutional language on territorial claims, and third-party guarantees. The strategic centre of gravity is no longer Karabakh — it is Syunik, the 40-km Armenian province whose connectivity status determines whether Turkey and Azerbaijan secure an unbroken Turkic land bridge to the Caspian and Central Asia. Armenia’s pivot away from Russia (CSTO functionally suspended, 102nd Base in Gyumri scheduled to draw down, EU monitoring mission EUMA expanded, French CAESAR artillery and Indian Pinaka/ATAGS systems delivered) is the most consequential geopolitical realignment in the post-Soviet space outside Ukraine. The risk of a renewed limited offensive against Syunik in 2026-27 is moderate-to-elevated; a full inter-state war is currently low-probability but not negligible if the treaty track collapses.

Theater Analysis

Strategic Geography

The South Caucasus is a 186,000 km² triangle bounded by the Greater Caucasus range, the Caspian, and the Turkish-Iranian frontier. Three structural facts dominate:

  1. Energy corridor. The Baku-Tbilisi-Ceyhan (BTC) oil pipeline, the South Caucasus Pipeline (SCP/Shah Deniz gas), and the planned Trans-Caspian connection make Azerbaijan a hard substitute for Russian hydrocarbons in EU markets. The 2022 Memorandum of Understanding between Brussels and Baku doubled committed Azeri gas to Europe to 20 bcm/year by 2027.
  2. Turkic land bridge. Azerbaijan’s exclave of Nakhchivan is separated from the Azerbaijani mainland by ≈40 km of Armenian territory (Syunik). A direct Baku-Nakhchivan-Turkey rail/road corridor has been a Turkish strategic objective since the 1992 Kars Treaty; it would integrate the Turkic states (Azerbaijan, Kazakhstan, Uzbekistan, Turkmenistan, Kyrgyzstan) into a single overland economic space anchored on Ankara.
  3. Iranian flank. Iran borders both belligerents and shares a 132 km border with Armenia (the Meghri crossing) — Tehran’s only direct overland link to a Christian, non-Turkic neighbour and a critical workaround to Western/Turkish containment. Loss of Iranian access through Syunik is treated in Tehran as a casus belli short of war.

Force Posture (mid-2026)

IndicatorArmeniaAzerbaijan
Active personnel~45,000~67,000
Defence budget (2025)$1.4 bn (≈5.5% GDP)$5.0 bn (≈4.6% GDP)
Combat aircraftSu-30SM (4), Su-25 legacyJF-17C Block III (Pakistan, ≥16), MiG-29
UAVsHermeS 900/450 (Israel, pre-2020), Bayraktar TB2 limitedBayraktar TB2/Akıncı, Harop (IAI), Orbiter
Artillery (notable)CAESAR 155mm (France, 36+), Pinaka MBRL (India), ATAGS 155mm (India)LORA SRBM (Israel), TRG-300 (Turkey), Polonez (Belarus)
Air defenceBuk-M2, Tor-M2KM, Akash (India, ordered)Barak-8, S-300PMU-2, Iron Dome (delivered 2024-25)
External defence partnersFrance, India, Greece, US (limited), EU (EUMA)Turkey, Israel, Pakistan, Italy

The force ratio is roughly 1:3 in materiel and 1:3.5 in budget. Azerbaijan’s qualitative edge in ISR, electronic warfare, and loitering munitions — decisive in 2020 and 2023 — has been partially eroded but not closed by Armenian rearmament. Yerevan’s bet is on layered air defence and precision artillery to deny a repeat of the 2020 drone-swarm collapse, but its rear-area logistics in Syunik remain vulnerable.

Operational Picture

  • 2023 offensive (19-20 September). Azerbaijani forces conducted a 24-hour combined-arms operation with artillery, drone, and infantry assault against the de facto Artsakh defence forces. Russian peacekeepers (deployed November 2020) did not intervene. The Artsakh leadership signed a ceasefire/disbandment agreement on 28 September 2023; by 30 September, an estimated 100,417 of the ≈120,000 ethnic Armenians had crossed into Armenia. The Republic of Artsakh formally dissolved on 1 January 2024.
  • Border delimitation (April 2024). Armenia returned four border villages in the Tavush region (Baganis Ayrum, Aşağı Əskipara, Xeyrımlı, Qızılhacılı) to Azerbaijani control under the Alma-Ata Declaration framework. Domestic protests in Armenia (the Tavush Movement led by Archbishop Bagrat Galstanyan) did not reverse the policy.
  • Russian peacekeeping withdrawal (April-June 2024). The Russian contingent (≤2,000 troops at peak) departed ahead of its 2025 mandate expiry. Departure was framed in Moscow as Azerbaijani-requested; in practice, Moscow acquiesced because the mandate was politically untenable post-2023.
  • Treaty initialing (March 2025). Yerevan and Baku announced that all 17 articles of the bilateral peace treaty were agreed. Two preconditions blocked signing: (a) Azerbaijani demand that Armenia amend its constitution to remove a preambular reference to the 1989 Declaration of Independence (which itself referenced Karabakh); (b) dissolution of the OSCE Minsk Group format. Armenia has accepted (b) in principle.
  • EUMA expansion (2024-25). The EU Monitoring Mission in Armenia, deployed February 2023 with ≈100 observers, expanded to ≈209 monitors with Canadian and US augmentation. Its mandate covers the Armenian side of the border only; Azerbaijan refused reciprocal access.

Critical Terrain: Syunik / Zangezur

Syunik is Armenia’s southernmost province. The provincial capital is Kapan. The province contains:

  • The Meghri border crossing (Iran).
  • The Goris-Kapan-Meghri highway, the only paved north-south road linking central Armenia to Iran.
  • Three pockets of pre-2020 Azerbaijani enclaves the status of which remains unsettled.

Azerbaijan’s reading of Article 9 of the November 2020 ceasefire statement is that Armenia is obligated to provide an “unimpeded” transit corridor through Syunik connecting Azerbaijan proper to Nakhchivan. Yerevan’s reading is that any such route operates under Armenian sovereignty, customs control, and tariffs. Baku — backed by Ankara — has periodically threatened to “open the corridor by force” if Yerevan refuses extraterritorial transit. President Aliyev’s August 2024 speech in Khankendi (Stepanakert) explicitly warned of “consequences” if the corridor was not delivered.

The September 2024 “Crossroads of Peace” initiative by Armenian PM Pashinyan offered a counter-proposal: reciprocal sovereign-but-open transit on Armenian-controlled rail and road infrastructure, with a third-party (likely Swiss or US) operator providing customs and security oversight. The August 2025 Trump-brokered framework in Washington — which floated a US private operator (TRIPP — Trump Route for International Peace and Prosperity) for the Syunik routes — added a third option but has not been finalized in legal text.

Proxy and External Actors

Russia: Strategic Eviction

Russia is the single biggest loser of the post-Karabakh realignment. Pre-2020, Moscow held simultaneous treaty obligations to Yerevan (CSTO, bilateral defence treaty, 102nd Military Base at Gyumri) and significant economic leverage over Baku. The 2020 war demonstrated that Moscow would not enforce the CSTO security guarantee against Azerbaijan; the 2023 collapse of Artsakh, with Russian peacekeepers passive, terminated whatever residual credibility the Russian security umbrella had in Yerevan.

  • Pashinyan announced Armenia’s de facto suspension from CSTO in February 2024; Yerevan stopped contributing to the joint budget in 2024 and walked out of the November 2024 summit.
  • Russian border guards withdrew from Yerevan’s Zvartnots airport (April 2024) and from segments of the Iranian border (mid-2024); the 102nd Base at Gyumri remains but with reduced posture and no operational role.
  • Russian gas via Gazprom-Armenia continues but is being progressively diversified. The Iran-Armenia gas-for-electricity swap is being expanded.

Moscow retains coercive options — economic (remittances are ≈9% of Armenian GDP), informational (Russian-language media penetration), and kinetic (the Gyumri base, intelligence networks) — but the strategic relationship has been functionally severed.

Turkey: Strategic Winner

Ankara’s “two states, one nation” alignment with Baku has matured into the dominant external posture. Turkey provided decisive ISR, advisory, and weapons inputs in 2020 and 2023, has deepened the Trilateral Defence Industry Cooperation framework with Azerbaijan and Pakistan, and is the primary advocate for the Zangezur corridor. The 2024 ratification of the Turkish-Azerbaijani Strategic Partnership update normalized rotational Turkish deployments at Azerbaijani bases — including air assets at the Turkish-built Hadrut and Fuzuli airfields in formerly Armenian-held territory.

The Erdoğan-Pashinyan rapprochement (special envoys appointed 2022, several meetings 2023-25, partial border reopening for third-country nationals 2024) has stalled short of full normalization. Ankara conditions reopening of the Turkish-Armenian land border on Armenia’s full acceptance of the Azerbaijani version of the corridor.

Iran: Strategic Loser, Active Spoiler

Tehran’s red line is the loss of its Armenian land border and the encirclement of Iran’s northwest by a Turkic-NATO-aligned bloc. Iranian responses since 2021:

  • Annual large-scale exercises (“Mighty Iran,” “Khaybar”) on the Aras (Araks) river border, with explicit messaging on corridor scenarios.
  • IRGC Ground Forces realignment to the northwest theatre (32nd Ansar al-Mahdi, 31st Ashura divisions).
  • Diplomatic alignment with Yerevan: opening of the Iranian consulate in Kapan (2022), expansion of the Meghri crossing, “3+3” framework activation alongside Russia.
  • Indirect support for Armenian military procurement (mediation with Indian suppliers, transit of components).

Iran has made clear, including via the Supreme Leader’s adviser Ali Akbar Velayati (multiple statements 2022-25), that any extraterritorial corridor in Syunik would be treated as a hostile act.

European Union, France, Greece, India

  • EU: Beyond EUMA, the EU has accelerated visa liberalization for Armenia, opened accession-track economic partnership talks (with the European Council June 2025 conclusions explicitly mentioning eventual candidate status as a possibility), and is the largest trade partner. The Council of the EU adopted in 2024 the European Peace Facility instrument to fund non-lethal support to the Armenian armed forces (€10 mn first tranche).
  • France: The defining external defence supplier. Bastion APCs, GM200 radars, Mistral 3 MANPADS, Mistral 3 medium air defence batteries, CAESAR 155mm (multiple batches), and contracts under negotiation for air-defence radars and naval cooperation. Paris has linked weapons supply to broader Caucasus normalization, but the political appetite to underwrite Armenian deterrence is durable across the political spectrum.
  • Greece, Cyprus: The Athens-Nicosia-Yerevan trilateral has produced training, technical exchange, and political endorsement. Hellenic Air Force assistance on Armenian air-policing modernization is the most tangible deliverable.
  • India: The most surprising entrant. Pinaka MBRL, ATAGS 155mm howitzers, Akash air-defence systems, Swathi weapon-locating radars, ammunition, and small arms. New Delhi’s logic is dual: counter Pakistan’s deep partnership with Baku (JF-17 transfer, special forces training) and secure the International North-South Transport Corridor (INSTC) which transits Iran, where the alternative to a hostile Azerbaijan-controlled Caspian route runs through Armenia.

United States and Israel

  • US: The Biden-era engagement (Blinken’s September 2023 condemnation of the offensive, “strategic dialogue” with Yerevan, halt of Section 907 waiver for security assistance to Baku in late 2023) shifted under the Trump administration toward a deal-making posture. The August 2025 Washington summit produced a framework joint declaration, the TRIPP corridor proposal, and US lobbying for treaty signature. US security assistance to Armenia is modest but symbolic (training, FMS pipeline opened).
  • Israel: A core military supplier to Azerbaijan (LORA, Harop, Heron, ELM-2080 Green Pine) and a significant intelligence partner. Israeli use of Azerbaijani basing for ISR against Iran is a persistent open-source assessment, denied by both governments. The Israeli relationship locks Baku into the Israel-Turkey-Pakistan triangle and reinforces Iranian threat perception.

Escalation Scenarios (12-24 month horizon)

Scenario 1 — Treaty Signature and Managed Cold Peace (probability: 35-40%)

Armenia passes a constitutional amendment (referendum, 2026-27) removing the contested preambular language. Treaty is signed. Border delimitation continues in stages. The corridor is operationalized as a sovereign-but-open Armenian route with international monitoring (TRIPP framework or successor). EU accession talks with Armenia formalize. Azerbaijan retains coercive leverage but exercises restraint.

Indicators: Constitutional drafting commission active and converging on text; OSCE Minsk Group formally dissolved by mutual letter; Russian 102nd Base draw-down accelerated; Indian and French weapons deliveries continue without provocation.

Scenario 2 — Frozen Stalemate (probability: 35-40%)

Treaty initialed but not signed. Constitutional amendment delayed or fails. Aliyev escalates rhetoric on Syunik but does not launch a major military operation. Limited cross-border incidents continue. Armenia continues rearmament; Azerbaijan reinforces Nakhchivan. EUMA mandate renewed annually. Russia plays spoiler through information operations and political proxies in Yerevan. Status: durable, brittle.

Indicators: Recurring localized incidents without major casualties; missed treaty signing deadlines; Pashinyan domestic political weakness; corridor talks stuck at customs/sovereignty question.

Scenario 3 — Limited Azerbaijani Military Operation in Syunik (probability: 20-25%)

Triggered by treaty collapse, perceived Western preoccupation (Ukraine, Middle East, Taiwan), or domestic Aliyev consolidation needs. Limited objective: seize a corridor of terrain along the Goris-Kapan-Meghri axis sufficient to coerce a Yerevan capitulation on extraterritorial transit. Likely modalities: 48-72 hour combined-arms operation, drone-saturated, possibly preceded by manufactured incidents. Iran issues red-line warnings; Russian response performative; EU/US response conditioned on Iranian behaviour.

Indicators: Azerbaijani force concentration in Nakhchivan and on Syunik approaches; intensified information operations on “corridor obstruction”; deterioration of Pashinyan domestic position; Iranian rhetoric escalation matched by reduced Iranian conventional posture.

A full Iranian military intervention against Azerbaijan is low-probability (Tehran is overstretched) but Iranian Special Operations / IRGC-Quds proxy activity, including possible kinetic action against Azerbaijani energy infrastructure, is plausible. Such an outcome would reorder the conflict from a bilateral territorial dispute into a regional crisis with NATO (via Turkey), Russia, and the Iran-Israel axis directly entangled.

Strategic Implications

  1. Russia’s South Caucasus hegemony is over. This is the most underweighted strategic shift of the decade. Moscow’s instruments of influence — CSTO, peacekeeping, gas, remittances — have all degraded simultaneously. The South Caucasus is now contested between Turkey, the EU, India, Iran, and the US, with Russia in the second tier. The model — a CSTO ally exiting the alliance under direct adversary pressure without Russian military response — will be studied in Belarus, Kazakhstan, Kyrgyzstan, and Tajikistan.
  2. The Zangezur corridor is the next inflection point. Whether opened on Armenian sovereign terms (Crossroads of Peace) or under coerced extraterritorial conditions, the Syunik connectivity question structures Turkic integration, Iranian containment, and INSTC viability.
  3. Armenia’s Western pivot is durable but exposed. Yerevan has bet decisively on EU/France/India and accepted Russian retaliation costs. The bet pays off only if Western and Indian weapons flow at scale, EU accession talks deliver sustained political cover, and US engagement survives across administrations.
  4. Azerbaijan is now a middle power. Energy revenues, demographic and economic asymmetry over Armenia, Turkish strategic partnership, Israeli arms pipeline, and demonstrated military competence position Baku as a regional decision-maker, not a stake. Aliyev’s authoritarianism (rated “Not Free” by Freedom House since 2009; mass arrests of journalists 2023-25) is a Western dilemma but not a constraint on Western dependence.
  5. Iranian decline accelerates. Loss of the Armenian land bridge would compound losses in Syria, attrition of Hezbollah, and the broader 2024-25 setbacks. Tehran’s Caucasus options narrow as Armenia’s Western ties deepen and Russia withdraws.
  6. For the Brazilian foreign policy community, the South Caucasus illustrates the limits of “non-aligned” hedging when revisionist powers concentrate force at decisive moments — and the role of arms-supplier diversification (France, India) as instruments of small-state survival.

Sources

Primary Documents

  • Trilateral statement of 9-10 November 2020 (Russia-Armenia-Azerbaijan), full text.
  • Joint Declaration of the Washington Summit, August 2025 (Trump-Aliyev-Pashinyan framework).
  • European Council Conclusions on Armenia, June 2025.
  • EU Mission in Armenia (EUMA) mandate documents and quarterly reports, 2023-25.

Multilateral and Government Reporting

  • International Crisis Group, Charting Armenia and Azerbaijan’s Possible Peace, Briefing N°97 (2023); follow-on briefings 2024-25.
  • US Department of State, Country Reports on Human Rights — Azerbaijan, Armenia (2023, 2024).
  • European Parliament resolutions on Nagorno-Karabakh (October 2023, January 2024).
  • UNHCR situation reports on Armenian displacement from Nagorno-Karabakh (October-December 2023).

Think-Tank and Academic

  • Carnegie Endowment / Carnegie Politika — Thomas de Waal corpus on Armenia-Azerbaijan, 2020-25.
  • Royal United Services Institute (RUSI) — analyses on Azerbaijani drone operations and Armenian rearmament.
  • Foreign Policy Research Institute / War on the Rocks — Syunik corridor scenarios, 2023-25.
  • IISS, The Military Balance 2025 — Armenia and Azerbaijan force structures.
  • SIPRI Arms Transfers Database — Armenia and Azerbaijan import data, 2020-25.

OSINT and Investigative

  • Caucasus Heritage Watch (Cornell University) — satellite monitoring of Armenian cultural and military sites in Karabakh and surrounding territories.
  • Armenian Weekly, Civilnet, OC Media, JAM-news — running event-by-event coverage.
  • Bellingcat — verification work on 2020 and 2023 operations.
  • Conflict Intelligence Team / Janes — order-of-battle and weapons identification.

Assessment based on open-source reporting through 7 May 2026. Probability ranges are analyst judgments and do not reflect formal estimative methodology.

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