Background

By summer 1921 the Bolshevik takeover of the South Caucasus was substantially complete: Azerbaijan in April 1920, Armenia in December 1920, Georgia in February 1921. The territorial settlements between the three new Soviet republics, however, were unresolved; in particular, the borders between Soviet Azerbaijan and Soviet Armenia in the Armenian-populated districts of Karabakh, Zangezur and Nakhichevan were the subject of continuous internal Bolshevik dispute.

The Caucasian Bureau (Kavbiuro) of the Russian Communist Party, a central-committee organ chaired by Sergo Ordzhonikidze, was the principal forum in which these disputes were adjudicated. By spring 1921 Soviet Armenian First Secretary Aleksandr Myasnikyan had been pressing for the transfer of all three districts to Armenian SSR jurisdiction. Soviet Azerbaijani leader Nariman Narimanov had been pressing for the opposite. The Treaty of Moscow of 16 March 1921 between Soviet Russia and Kemalist Turkey had complicated the picture by guaranteeing Turkish protective status over Nakhichevan and tying its fate to Azerbaijan; Karabakh and Zangezur were left for the Soviet republics to resolve internally.

The event

The Kavbiuro met in Tiflis on 4 July 1921 to consider Karabakh's status. The minutes, which Saparov has reconstructed in detail from the Soviet archives, record a vote of 4 to 3 to assign mountainous Karabakh to Soviet Armenia, with provision for a referendum to confirm the decision among the population. The voters in favour included Ordzhonikidze, Kirov, Myasnikyan and Mahmud-Bek Nazaretyan; against were Narimanov and two of his allies.

Narimanov objected that the decision had been taken in his absence (he had walked out before the vote) and that, given the importance of the question, it required Central Committee review. He communicated his objection that night to Joseph Stalin, then People's Commissar of Nationalities and at that point on a working visit to the South Caucasus, by direct appeal.

The Kavbiuro reconvened the next day, 5 July 1921. Stalin attended in person. The minutes record a new resolution, again carried 4 to 3, that reversed the previous day's decision and assigned Karabakh to Soviet Azerbaijan. The new resolution provided that Karabakh would be granted "wide regional autonomy" inside Azerbaijani SSR, with Shusha as its administrative centre and the Armenian-majority mountainous districts as its core. Crucially, the autonomy provision was not binding: it instructed the Azerbaijani SSR to draft an autonomous statute, which would not be issued for two further years (the formation of NKAO in July 1923).

The substantive question is why Stalin reversed the decision. Saparov's archival reconstruction emphasises four factors:

The new Bolshevik diplomatic relationship with Kemalist Turkey, formalised by the Treaty of Moscow, created political costs for any Bolshevik decision against Azerbaijani Muslim interests, which Mustafa Kemal had explicitly raised in correspondence;
The economic argument that Karabakh's lowlands were tied by infrastructure to the Azerbaijani plain, which was true geographically but had limited weight given that Karabakh had been politically and culturally tied to Armenia for centuries contested;
Narimanov's threat that Soviet Azerbaijan would not survive politically the loss of Karabakh, which was overstated but politically operative;
The Bolshevik preference, articulated by Stalin in his nationalities work, for territorial settlements that internalised national tensions inside larger units rather than partitioned them, a form of ethno-federal containment that would later be applied across the USSR.

de Waal's narrative places more emphasis on Stalin's personal arbitration and on the absence of any single reason; the decision was over-determined.

Aftermath

The 5 July decision was the legal foundation for every twentieth-century settlement of Karabakh's status. The NKAO was constituted on 7 July 1923, with internal boundaries drawn so that the Armenian-majority mountainous core was included while several adjacent Armenian villages and the contiguous Armenian-populated districts of Shahumyan, Getashen and northern Karabakh were left out, a gerrymander whose effect was to weaken the autonomous unit's cohesion editorial. The Soviet Constitution of 1936 codified the arrangement.

Soviet Armenian protests against the 1921 decision were repeated throughout the Soviet period, in 1945 (under Harutyunov to Stalin), in 1965 (the Khrushchev-era Armenian Communist petition), and in 1977, and were rejected each time. The decision held until February 1988, when the NKAO's own Soviet attempted to undo it.

Memory and politics

The 5 July reversal is the founding fact of the modern conflict. Both Armenian and Azerbaijani readings agree on its centrality; they disagree only on its legitimacy. In Armenian historiography the decision is read as a Stalinist act of geopolitical convenience that violated both demographic logic and the prior 4 July vote. In Azerbaijani historiography it is read as a legitimate territorial determination that was subsequently confirmed by the 1923 NKAO formation, the 1936 Constitution, the 1994 Bishkek ceasefire and the UN Security Council resolutions of 1993 contested.

The legal weight of the 1921 decision in international law has been contested. Armenian advocates have argued that an internal Bolshevik party-organ decision cannot create binding international title; Azerbaijani diplomacy has consistently treated the Soviet-internal succession as the basis for the territorial-integrity argument that has been endorsed by the UN, the Council of Europe and (with abstentions from the three Minsk Group co-chairs) UN GA Resolution 62/243 of 2008.

Saparov's 2014 monograph is the most thorough archival reconstruction in any Western language; the de Waal narrative remains the most-read general account; and the original Kavbiuro minutes are publicly available in Russian.