Turkish–Armenian War

The immediate trigger for the Turkish–Armenian War of 1920 was the signing of the ^[1] in August of that year. The treaty, imposed on the defeated Ottoman government by the Allied Powers following the First World War, awarded large tracts of eastern Anatolia to the ^[2], including the strategically vital regions around Trabzon, Erzurum, and Van. Ottoman delegates signed under duress, and the parliament in Constantinople refused ratification. For the Turkish National Movement under Mustafa Kemal Pasha, Sèvres was not a binding settlement but an act of dismemberment to be reversed by force.

The structural precondition for the conflict was the collapse of Ottoman imperial authority and the simultaneous emergence, in 1918, of two antagonistic successor entities claiming sovereignty over overlapping territory in eastern Anatolia and the South Caucasus. The Armenian republic, proclaimed in May 1918 following the disintegration of the Transcaucasian Federation, held a precarious position: its population had been catastrophically reduced by the genocide carried out against Ottoman Armenians during the war ^[3], its economy was shattered, and its military was small and poorly supplied. The Nationalist government seated in Ankara, by contrast, was consolidating control over Anatolia and rebuilding from the remnants of the Ottoman army, including the XV Corps stationed in the east under Kâzım Karabekir. The republic's institutional fragility made it a vulnerable target at precisely the moment Nationalist Turkey needed a territorial and political success.

Territorial contestation in the region long predated Sèvres. The borderlands of Kars, Ardahan, and Batum had changed hands repeatedly between Ottoman and Russian forces, and the Armenian population's geographic distribution across what both states considered their sovereign core made any boundary settlement inherently zero-sum ^[4]. The brief Ottoman reoccupation of the Caucasus in 1918 following the Treaty of Brest-Litovsk had already produced Armenian–Turkish fighting around Kars and Alexandropol, establishing a pattern of violent competition that the Armistice of Mudros interrupted but did not resolve ^[5].

The ideological dimension was inseparable from the Nationalist program itself. Kemal's movement conceived of Anatolia as an indivisible Turkish homeland, a position that admitted no territorial concession to an Armenian state, however internationally recognized ^[6]. The orders issued by the Ankara government to Karabekir — to "eliminate Armenia physically and politically" — reflected not merely strategic calculation but a deliberate continuation of the demographic logic that had shaped Ottoman policy toward Armenians since at least 1915 ^[7]. In this framing, the war was less a conventional border conflict than an effort to foreclose permanently any territorial basis for Armenian statehood in eastern Anatolia.

When Karabekir's forces crossed into Armenian-held territory in September 1920, the campaign unfolded rapidly. The fall of Sarıkamış, followed by the Battle of Kars in October and the investment of Alexandropol, left the Armenian republic without the military capacity to continue resistance ^[8]. The coincident advance of Soviet forces from the north placed the republic in an impossible strategic position, and it concluded the war through the Treaty of Alexandropol in December 1920, surrendering the territorial gains Sèvres had promised and effectively ending its independence. The war thus achieved through military means what Nationalist Turkey had refused to accept through diplomacy.

The war ended in late 1920 with a comprehensive Armenian military collapse. Following the fall of Kars in late October and the subsequent Battle of Alexandropol, the Armenian government signed the Treaty of Alexandropol on 2–3 December 1920 — a deeply punitive settlement that stripped Armenia of all territorial gains promised under the Treaty of Sèvres, required the dismantlement of its armed forces to a token constabulary, and subordinated Armenian foreign policy to Turkish approval^[1]. The treaty was never formally ratified, however, because Soviet forces simultaneously entered Armenia from the north and the Bolshevik-installed government that replaced the Armenian Republic repudiated the agreement in favor of separate negotiations with Ankara^[2].

The immediate political consequence was the extinction of the First Republic of Armenia. The Armenian Revolutionary Federation government, which had led the republic since 1918, lost power on 29 November 1920 when Soviet forces crossed the Aras River, and Armenia was incorporated into the Soviet system^[3]. This outcome suited both Ankara and Moscow: the Treaty of Kars, concluded in October 1921 between the Turkish National Movement and the Soviet republics of the South Caucasus, finalized the territorial settlement^[4], fixing the northeastern boundary of Turkey roughly where the Alexandropol terms had envisioned and transferring Kars, Ardahan, and Artvin permanently to Turkish sovereignty^[5]. The strategic partnership between Kemalist Turkey and Soviet Russia — forged in shared hostility to the Entente-backed post-war order — shaped the Caucasian political map for the remainder of the twentieth century.

The human and demographic consequences were catastrophic for Armenians. The combined effect of the 1915 genocide, the intercommunal violence of 1918–1920, and the losses of the Turkish–Armenian War drove the near-total disappearance of the Armenian population from eastern Anatolia^[6]. Refugees from the territories overrun by Karabekir's forces flooded into what remained of Soviet Armenia, compounding a population already ravaged by famine and epidemic^[7]. The surviving diaspora dispersed across the Middle East, Western Europe, and the Americas, forming communities that carried the memory of loss as a defining political and cultural identity^[8].

What the war failed to resolve, and what it instead calcified, was the question of accountability for the destruction of the Ottoman Armenian population. The Sèvres framework had included provisions for an international tribunal to address wartime atrocities; the defeat of Armenia and the subsequent renegotiation of the entire post-Ottoman settlement at Lausanne in 1923 buried those provisions entirely^[9]. The Turkish national historiography that crystallized around the Kemalist victory treated the eastern campaign as a straightforward defensive war against an aggressive Armenian state, leaving no institutional space for acknowledgment of the genocide that had preceded and contextually shaped it^[10]. That interpretive gulf between Turkish and Armenian national memory has remained the central obstacle to any normalization of relations between the successor states, and the territorial and demographic consequences of 1920 have furnished the irresolvable core of that dispute.