Second Nagorno-Karabakh War

The fall of Shusha in November 2020 and the ceasefire that followed marked the decisive end of a 44-day war, but the conflict that exploded on 27 September 2020 had structural roots reaching back to the violent dissolution of the Soviet Union. The proximate trigger was Azerbaijan's large-scale offensive along the entire line of contact in Nagorno-Karabakh, launched after years of ceasefire violations and failed diplomacy — but behind that offensive lay three decades of unresolved territorial grievance, accumulating military investment, and shifting regional alignments^[1].

The foundational dispute was territorial and political. Nagorno-Karabakh, an autonomous oblast with an Armenian majority, had been assigned to the Azerbaijan Soviet Socialist Republic under Soviet administrative arrangements in the 1920s. As Moscow's authority collapsed in the late 1980s, the oblast's legislature voted to join the Armenian SSR, triggering intercommunal violence that escalated into full-scale war after 1991^[2]. The First Nagorno-Karabakh War ended in a 1994 ceasefire that left Armenian forces and the self-declared republic of Artsakh in control of Nagorno-Karabakh and seven surrounding Azerbaijani districts — roughly twenty percent of Azerbaijan's internationally recognized territory. No peace treaty was signed, and the OSCE Minsk Group negotiations that followed produced no binding settlement over the subsequent quarter-century^[3]. For Baku, the occupied territories and the displacement of hundreds of thousands of Azerbaijanis were standing grievances that successive governments treated as an existential issue of sovereignty.

The economic and military asymmetry that had kept Azerbaijan from reclaiming those territories by force in the 1990s and 2000s had been substantially corrected by 2020. Oil revenues generated by the Baku–Tbilisi–Ceyhan pipeline, operational from 2006, funded a sustained modernization of the Azerbaijani armed forces^[4]. By the time of the 2020 war, Azerbaijan's defense budget dwarfed Armenia's, and Baku had acquired a significant advantage in loitering munitions and armed drones — including Turkish Bayraktar TB2 systems and Israeli-manufactured platforms — that would prove decisive in degrading Armenian and Artsakhi armor and air-defense networks during the fighting at Hadrut and the Aras Valley campaign^[5].

The geopolitical context of 2020 made Azerbaijani action more viable than at any prior moment. Turkey under President Erdoğan deepened its military partnership with Azerbaijan, providing not only materiel but operational advisers and, according to multiple assessments, Syrian contract fighters^[6]. Russia, the traditional security guarantor for Armenia through the Collective Security Treaty Organization, showed no appetite for direct intervention — its attention was divided among multiple theaters, and Moscow may have calculated that a reconfigured status quo remained manageable. Armenia, meanwhile, had undergone a domestic political transition after the 2018 "Velvet Revolution" and had not translated its reform momentum into defense modernization. The cumulative effect was that Azerbaijan entered September 2020 with a credible military option it had not previously possessed^[7].

Ideological and informational factors reinforced the structural conditions. Azerbaijani national identity had been organized around the narrative of occupation and return since the 1994 ceasefire, making recourse to force broadly popular domestically^[8]. Armenian political culture, conversely, had difficulty acknowledging the military vulnerability that three decades of stalemate had obscured. Disinformation dynamics on both sides distorted public perception of battlefield realities during the fighting itself^[9], but the underlying mobilization of Azerbaijani national sentiment was an autonomous political force — one that constrained Baku's diplomatic flexibility and gave the September offensive a legitimating logic that extended well beyond the calculations of any single leadership faction.

The forty-four-day war ended on 10 November 2020 with a Russian-brokered trilateral statement signed by Azerbaijan, Armenia, and Russia — a ceasefire declaration rather than a formal peace treaty, a distinction that would carry lasting significance ^[1]. Under its terms, Armenia ceded control of the districts surrounding Nagorno-Karabakh that Armenian forces had held since the early 1990s, as well as the strategically vital city of Shusha — whose fall in the Battle of Shusha effectively decided the war — and acknowledged Azerbaijani sovereignty over substantial additional territory within the region itself. A Russian peacekeeping contingent of approximately 2,000 troops was deployed along a defined corridor to oversee the Lachin land route connecting Armenia to the remaining Armenian-administered enclave, while Azerbaijan gained the right to a land corridor through Armenian territory linking its mainland to the exclave of Nakhchivan ^[2].

The political consequences inside Armenia were immediate and severe. The defeat shattered the governing coalition built around Prime Minister Nikol Pashinyan, whose handling of the war ignited mass protests in Yerevan and demands for his resignation from opposition parties and military officers alike ^[1]. Although Pashinyan survived the immediate crisis and was returned at a snap election in June 2021, the war fundamentally delegitimized the post-2018 reform government in the eyes of a significant portion of the Armenian public and the diaspora. The armed forces, whose technological and doctrinal unpreparedness had been exposed by Azerbaijani drone warfare, faced institutional pressure for comprehensive restructuring. In Azerbaijan, by contrast, the outcome was celebrated as the recovery of internationally recognized territory and vindicated President Ilham Aliyev's long-held position that the status quo established after the First Nagorno-Karabakh War was inherently temporary ^[3].

Geopolitically, the war confirmed Turkey's emergence as a direct military patron in the South Caucasus. Turkish-supplied Bayraktar TB2 drones and the reported facilitation of Syrian mercenary fighters substantially shaped Azerbaijan's operational success, deepening the Ankara–Baku strategic alignment and unsettling both Russia and Iran, each of which shares borders with the conflict zone ^[4]. Russia's role as the ceasefire guarantor preserved its leverage over both belligerents but also exposed the limits of Moscow's mediating authority — its peacekeepers held a narrow mandate in a corridor that remained contested in practice. The Organization for Security and Co-operation in Europe's Minsk Group, co-chaired by France, Russia, and the United States, was effectively sidelined; the war had been resolved bilaterally under Russian auspices, not through the multilateral framework that had nominally governed the dispute since 1992 ^[5].

The humanitarian consequences were extensive. Tens of thousands of ethnic Armenians displaced from recovered Azerbaijani territories joined earlier waves of displacement, while allegations of violations against prisoners of war and civilian infrastructure — including the shelling of the Ghazanchetsots Cathedral in Shushi and the Barda missile attacks — generated international condemnation and calls for accountability that went largely unresolved ^[6]. The economic geography of the region was redrawn: Azerbaijan regained agricultural land, transit routes, and access to the town of Fuzuli, whose capture in the Battle of Fuzuli opened the southern axis of advance.

What the November 2020 statement conspicuously failed to settle was the underlying question of Nagorno-Karabakh's political status. The ceasefire froze rather than resolved sovereignty, leaving the Armenian population of the remaining enclave in a condition of acute legal and physical precarity. Post-war skirmishes along the new line of contact continued through 2021 and escalated into substantial clashes in 2022 along the Armenian–Azerbaijani border proper, demonstrating that the war had shifted the balance of power without producing a durable peace ^[1]. The Russian peacekeeping mandate was finite, the Lachin corridor remained a pressure point, and no internationally supervised status determination had been agreed. The war resolved who held the ground; it did not resolve what that ground ultimately was.