Treaty of Moscow
In the view of Nadia Milanova, Nagorno-Karabakh represents a combination of separatism and irredentism. However, the area has historically been Armenian, known as the Kingdom of Artsakh or Khachen. In July 1920, the 11th Soviet Red Army invaded and occupied the region and on July 28, the decision to make Nakhchivan a part of modern-day Azerbaijan was cemented on March 16, 1921, in the Treaty of Moscow between Soviet Russia and the newly founded Republic of Turkey.