 Following administrative reforms, the northern part of the Nakhchivansky Uyezd (Daralagyoz) was separated to form part of the new Sharur-Daralagezsky Uyezd in 1870.In 1918-1920, the uyezd was disputed between the First Republic of Armenia and the Azerbaijan Democratic Republic.After the establishment of Soviet rule, most of the uyezd became part of the Nakhichevan ASSR of the Azerbaijan SSR in accordance with the treaties of Moscow and Kars, while the southeasternmost corner became part of the Armenian SSR.