The Republic of Aras (Azerbaijani: Araz Respublikası; also known as the Republic of Araks or the Araxi Republic) was a short-lived and unrecognized state in the South Caucasus, roughly corresponding with the territory that is now the Nakhchivan Autonomous Republic of Azerbaijan. Named after the Aras River that formed its southern border, the republic was declared in December 1918 by Jafargulu Khan Nakhchivanski with support from the Azerbaijan Democratic Republic's ruling party, the Musavat Party, and the government of the Ottoman Empire.