A Conflict Forged in Mountain and Memory

The Nagorno-Karabakh dispute between Armenia and Azerbaijan represents one of the most intractable and violent territorial conflicts to emerge from the collapse of the Soviet Union. At its core, the struggle is a tangle of competing nationalisms, historical grievances, and strategic imperatives, all amplified by the region’s formidable geography. For decades, the mountainous enclave, internationally recognized as part of Azerbaijan but for much of the post-Soviet era controlled by ethnic Armenians, has been a flashpoint for war, displacement, and diplomatic deadlock. The conflict has reshaped borders, upended lives, and drawn in regional powers, leaving a legacy of trauma that continues to define the South Caucasus.

The Geography of Nagorno-Karabakh: Mountains as Moat and Battleground

The name Nagorno-Karabakh itself—from the Russian nagorny (mountainous) and Turkic-Persian karabakh (black garden)—underscores the centrality of terrain. The region is a highland area within the Lesser Caucasus mountain range, characterized by rugged peaks, deep gorges, and dense forests. Elevations range from 1,000 to 3,700 meters. This terrain has historically been both a sanctuary and a prison. For the Armenian population, the mountains provided a natural fortress against outside invaders, enabling local militias to resist Ottoman and Persian armies for centuries. However, the same topography isolated the enclave from Armenia proper, separated by the Lachin Corridor—a narrow mountain pass that became a lifeline and a flashpoint.

Strategic High Ground and Military Implications

Control of ridgelines and peaks is decisive in Nagorno-Karabakh. The 2020 war demonstrated how modern technology (drones, precision artillery) could partly neutralize terrain advantages, but geography still dictated supply routes and defensive positions. Key heights such as Murovdag, the Karabakh Range, and the mountains surrounding Shusha (historically the cultural heart of the region) were fiercely contested. The terrain also complicates logistics: roads are narrow, prone to landslides, and often impassable in winter. Armored columns are vulnerable in the valleys, while infantry face punishing climbs. The mountainous landscape has shaped the conflict into a series of disputes over corridors, passes, and fortified positions—a pattern that persisted from the 1990s through the 2023 Azerbaijani offensive.

Water Resources and Economic Geography

Beyond military advantage, the region’s rivers—the Tartar, Khachen, and Karkar—originate in the mountains and provide water for agriculture and hydroelectric power downstream in both Armenia and Azerbaijan. Control over headwaters has added an environmental dimension to the conflict. Additionally, the mountainous terrain limits arable land, concentrating population and economic activity in the few valleys and foothills, which in turn intensifies competition for those areas. The region’s mineral resources, though not vast, include gold and copper deposits near the town of Kashen, which have attracted commercial interest.

Ethnic Composition and the Roots of Tension

Before the war, Nagorno-Karabakh (known to Armenians as Artsakh) was a patchwork of villages and towns where ethnic Armenians constituted the overwhelming majority—over 75% by the late Soviet period, concentrated in the highlands. The lowlands and surrounding districts were predominantly Azerbaijani. This demographic mosaic was a product of centuries of migration, imperial rule, and Soviet nationality policies that deliberately intermixed groups to dilute nationalist aspirations. Under the USSR, Nagorno-Karabakh was an autonomous oblast within Soviet Azerbaijan, a status that satisfied neither side: Armenians saw it as an injustice, while Azerbaijanis viewed it as a concession to Armenian irredentism.

Soviet Legacy and National Identity

The Soviet system institutionalized ethnicity through internal passports, affecting housing, education, and employment. In Nagorno-Karabakh, this meant that ethnic Armenians and Azerbaijanis lived side by side but often in separate social worlds. Intercommunal relations were strained by economic competition and historical memories of massacres—notably the 1915 Armenian genocide and the 1918-1920 Armenian-Azerbaijani war. By the late 1980s, as Glasnost opened space for political expression, both communities mobilized. The Nagorno-Karabakh Regional Council’s 1988 vote to transfer the region to Armenia sparked a chain reaction: pogroms against Armenians in Sumgait and Azerbaijanis in Armenia, mass displacement, and eventually full-scale war.

The Conflict’s Trajectory: From War to Truce to War Again

The First Nagorno-Karabakh War (1988–1994)

The collapse of Soviet authority created a power vacuum. Local Armenian militias, backed by the newly independent Republic of Armenia, fought Azerbaijani forces for control of the enclave and the surrounding territories. By 1993, Armenian forces had captured all of Nagorno-Karabakh plus seven Azerbaijani districts outside its borders (a buffer zone roughly 20% of Azerbaijan’s territory). The war resulted in an estimated 30,000 deaths and over a million displaced persons—mostly Azerbaijanis from the occupied territories, but also Armenians from Azerbaijan proper. The 1994 Bishkek Protocol ceasefire froze the conflict, leaving Nagorno-Karabakh as a de facto independent republic (not recognized by any UN member state) heavily dependent on Armenia. The Lachin Corridor linked the two, while the surrounding lowlands became a devastated no-man’s land.

The Stalled Peace Process and Escalation

For decades, the OSCE Minsk Group (co-chaired by France, Russia, and the United States) attempted to broker a settlement. Several proposals—most notably the 1997 "package deal" and the 2007 Madrid Principles—envisioned gradual return of territories to Azerbaijan, interim status for Nagorno-Karabakh, and a future referendum on its final status. Neither side accepted the compromises. Meanwhile, frontline skirmishes grew deadlier as both countries modernized their militaries with oil wealth (Azerbaijan) and Russian arms (Armenia). The April 2016 Four-Day War saw heavy casualties and demonstrated Azerbaijan’s willingness to use force to recover territory.

The 2020 War: The Battle of Shusha and Russian Intervention

The second major war erupted on September 27, 2020. Azerbaijan, armed with Israeli drones, Turkish bayraktar UAVs, and advanced artillery, launched a coordinated offensive along multiple axes. The Azerbaijani army broke through Armenian defenses in the south, capturing Jabrayil, Fuzuli, Hadrut, and the strategic town of Shusha on November 7–8. Shusha’s fall—perched on a mountain overlooking Stepanakert (Khankendi)—was decisive. On November 9, a Russian-brokered ceasefire ended hostilities within 14 days. Under the agreement, Armenia returned all territories surrounding Nagorno-Karabakh plus parts of the enclave itself. Russia deployed approximately 2,000 peacekeepers along the Lachin Corridor. The war killed over 6,500 people and resulted in thousands more displaced. Nagorno-Karabakh’s size shrank to roughly one-third of its former extent.

The 2023 Azerbaijani Offensive and the End of the Republic

Despite the peacekeeping presence, tensions remained. Azerbaijan imposed a blockade of the Lachin Corridor starting in December 2022, leading to severe shortages of food, medicine, and fuel in Nagorno-Karabakh. On September 19, 2023, Azerbaijan launched a 24-hour military operation that quickly overwhelmed the remaining Armenian defenses. The de facto government surrendered the next day. Within a week, over 100,000 ethnic Armenians fled to Armenia, effectively emptying the region of its Armenian population—a mass exodus. On January 1, 2024, the Nagorno-Karabakh Republic was formally dissolved. Azerbaijan restored full sovereignty over the territory, raising the Azerbaijani flag in Stepanakert (renamed Khankendi) for the first time in three decades.

Impact of Terrain and Ethnic Tensions on Conflict Dynamics

Terrain as a Force Multiplier and Vulnerabilities

The mountainous landscape shaped military strategies. In the 1990s, Armenian forces used the high ground to maintain a defensive advantage, often relying on fortified positions (tunnels, bunkers) that required massive artillery and airpower to dislodge. In 2020, Azerbaijan’s use of drones exposed the vulnerability of such static defenses: UAVs could identify and strike targets in rear areas without risking ground forces. However, the mountainous terrain also limited the effectiveness of drones, particularly in defilade positions and under weather conditions. The Lachin Corridor, a winding road through the mountains, became a symbol of the conflict—its control meant the difference between connection and siege. The blockade in 2022–2023 demonstrated how even a peacekeeping force could not prevent a determined state from using terrain to strangle a population.

Ethnic Nationalism and the Zero-Sum Mindset

Ethnic tensions are not merely a byproduct of ancient hatreds; they have been actively cultivated by both governments for nation-building purposes. In Armenia, the cause of Artsakh became central to national identity, with political elites using it to legitimize their rule. In Azerbaijan, the loss of territory in the 1990s became a national trauma, fueling revanchism and military build-up. The "victory" in 2020 and 2023 was celebrated as the restoration of territorial integrity and historical justice. For Armenians, the loss is mourned as the end of a centuries-old presence in the region. This ethnic framing makes compromise difficult because any concession is portrayed as betrayal of the nation. The displacement of populations—Azerbaijanis in the 1990s and Armenians in 2023—has created irreversible demographic facts that further entrench the conflict’s zero-sum nature.

International Responses and the Shifting Balance

The conflict’s geography and ethnic dimensions have attracted external actors with competing interests. Russia has historically been the dominant power in the South Caucasus, acting as both arms supplier and peacebroker. However, its focus on Ukraine since 2022 reduced its ability to project force in Nagorno-Karabakh, creating a vacuum that Turkey and Israel filled through military support to Azerbaijan. Turkey’s rhetoric of "one nation, two states" with Azerbaijan resonated ethnically and geopolitically. Iran, with its own large Azeri minority, has walked a careful line, fearing both Azerbaijani irredentism and Armenian territorial claims. The European Union and United States have provided humanitarian aid and mediation attempts, but their influence is limited without military engagement.

Current Realities and the Road Ahead

As of early 2025, Azerbaijan controls all of Nagorno-Karabakh. The region is heavily militarized, with Azerbaijan rebuilding infrastructure and encouraging return of displaced Azerbaijanis. The Russian peacekeeping mission, originally intended for five years, remains uncertain due to Russia’s own geopolitical strains. Armenia, led by Prime Minister Nikol Pashinyan, has signaled willingness to recognize Azerbaijani sovereignty over Nagorno-Karabakh in exchange for security guarantees and a peace treaty. However, deep mutual mistrust remains. Border delimitation is incomplete, and Armenia continues to accuse Azerbaijan of incursions into its sovereign territory. The Zangezur Corridor—a proposed transport link connecting Azerbaijan to its Nakhchivan exclave through southern Armenia—remains a point of contention, with Armenia fearing it would be an extraterritorial road.

The conflict has left a trail of human suffering. Over 100,000 ethnic Armenians displaced from Nagorno-Karabakh in 2023 face uncertain futures in Armenia, which struggles to integrate them. Wounded prisoners and missing persons on both sides remain unaccounted for. Cultural heritage has been destroyed or repurposed: Armenian monasteries and khachkars (cross-stones) in territories now under Azerbaijani control risk neglect or deliberate damage. International organizations like the International Committee of the Red Cross and UNHCR continue to document needs.

Prospects for a Sustainable Peace

A durable resolution will require addressing the emotional and historical dimensions alongside the territorial ones. Trust-building measures—such as joint economic zones, mine clearance, and cultural preservation guarantees—could reduce hostility. The peace negotiations brokered by the EU and US have made some progress, but the asymmetry of power (Azerbaijan holds all the cards) makes it difficult for Armenia to negotiate from strength. The risk of future escalation persists, particularly if nationalist factions on either side seek to exploit grievances. The international community has a role in monitoring human rights, supporting demilitarization, and facilitating regional integration—but ultimately, the parties must choose peace over perpetual grievance.

The Nagorno-Karabakh conflict is a stark reminder of how mountains and memories can harden into barriers. The region’s terrain may no longer be a battlefield, but it remains a landscape inscribed with loss. Whether it becomes a site of reconciliation or a source of renewed tension depends on leadership, political will, and the capacity of both societies to envision a future beyond war.