Empire in 1828 through the Treaty of Turkmenchay. The territory of the uezd roughly corresponded to the defunct Nakhichevan Khanate and was the site of large-scale Armenian repatriation from Iran, which was across the Aras river to the south. In 1844, the Caucasus Viceroyalty was reestablished, in which the Nakhichevan uezd briefly formed part of the Tiflis Governorate before its transfer to the newly established Erivan Governorate in 1849. The new governorate in addition to Nakhichevan also included the uezds of Erivan, Alexandropol, Nor Bayazet and Ordubad, however, the latter was later abolished in 1868 and incorporated into the south of the Nakhichevan and Zangezur uezds, the latter continuing to border Nakhichevan from the east. Not long after, further administrative reforms resulted in the separation of the northern part of the Nakhichevan uezd corresponding to the present-day Sharur District of Azerbaijan and the Vayots Dzor Province of Armenia to form the Sharur-Daralayaz uezd in 1870—bordering Nakhichevan from the north. On 3 March 1918, in accordance with the Treaty of Brest-Litovsk the Russian SFSR ceded the Kars and Batum oblasts to the Ottoman Empire who had been unreconciled with its loss of those territories (which they referred to as ) since 1878. Despite the resistance of the Transcaucasian Democratic Federative Republic which had initially rejected the Brest-Litovsk treaty, the Ottoman Third Army was successful in occupying the oblasts, and going on to expand into the western districts of the Erivan and Tiflis governorates, including the Nakhichevan uezd. These additional territorial gains were confirmed through the Treaty of Batum with the individual South Caucasus republics. Republic of Aras As stipulated in the Mudros Armistice, the Ottoman Empire was compelled to withdraw its armies from the Erivan and Tiflis governorates, thus withdrawing to the Treaty of Brest-Litovsk boundaries. One of the commanders of the occupying army, Yukub Shevki, sponsored the creation of the Republic of Aras in the occupied Erivan districts, providing it with moral support, weapons, and instructors. Following the conclusion of the 2-week Armeno-Georgian war, Armenia repositioned its forces to annex the Republic of Aras, however, their advance into the district was halted on 18 January 1919 by Captain F. E. Laughton who established a local British military governorship in the district. On 26 January 1919, the governorship was confirmed by the British military headquarters based in Tiflis (present-day Tbilisi) as a means to prevent ethnic clashes between Armenian soldiers and