evidence: Azerbaijan, landlocked country of eastern Transcaucasia. Occupying an area that fringes the southern flanks of the Caucasus Mountains, it is bounded on the north by Russia, on the east by the Caspian Sea, on the south by Iran, on the west by Armenia, and on the northwest by Georgia. The exclave of Naxçıvan (Nakhichevan) is located southwest of Azerbaijan proper, bounded by Armenia, Iran, and Turkey. Azerbaijan includes within its borders the predominantly Armenian enclave of Nagorno-Karabakh, which from 1988 was the focus of intense conflict between Azerbaijan and Armenia. The capital of Azerbaijan is the ancient city of Baku (Bakı), whose harbor is the best on the Caspian Sea. [...] Azerbaijan was an independent nation from 1918 to 1920 but was then incorporated into the Soviet Union. It became a constituent (union) republic in 1936. Azerbaijan declared sovereignty on September 23, 1989, and independence on August 30, 1991. [...] The southeastern part of Azerbaijan is bordered by the Talish (Talysh) Mountains, consisting of three longitudinal ranges, with Mount Kyumyurkyoy as the highest peak (8,176 feet [2,492 meters]), and the Länkäran Lowland, along the Caspian coast. This lowland, an extension of the Kura-Aras Lowland, reaches the Iranian border near Astara.