Geography of Tajikistan has headwaters in Afghanistan and Tajikistan. The other neighbors are the former Soviet republics of Uzbekistan (to the west and the north) and Kyrgyzstan (to the north). The lower elevations of Tajikistan are divided into northern and southern regions by a complex of three mountain chains that constitute the westernmost extension of the massive Tian Shan system. Running essentially parallel from east to west, the chains are the Turkestan, Zeravshan (Zarafshan), and Hisor (Gissar) mountains. The last of these lies just north of the capital, Dushanbe, which is situated in west-central Tajikistan. More than half of Tajikistan lies above an
Tajikistan–Uzbekistan relations the Axis powers during World War II resulted in a reaction from Soviet authorities which included population transfers that brought Caucasians to Central Asia. Both republics participated in the referendum in March 1991 in an attempt to preserve the Soviet Union in a different form, but was soon hampered by the attempted coup in August of that year. As a consequence, both Uzbekistan and Tajikistan declared their independence in the months of 1991 and became members of the Commonwealth of Independent States, in which officially gave way for the dismemberment of the Soviet Union at the end of the year.