The United States maintains two bases in Central Asia, one each in Uzbekistan and Kyrgyzstan, for its postwar operations[?!] in Afghanistan.
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The United States began leasing both Soviet-era bases during the run-up to the U.S.-led invasion of Afghanistan in 2001. They are used primarily to station soldiers, refueling jets, and cargo planes. Each airfield houses roughly 1,000 U.S. troops and civilian contractors.
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Where are the bases?

Karshi-Khanabad Air Base is located in southern Uzbekistan not far from Tajikistan; Manas Air Base is situated just north of Bishkek, Kyrgyzstan. The United States began leasing both Soviet-era bases [2021-20 or 2021-65 years ago?] during the run-up to the U.S.-led invasion of Afghanistan in 2001. They are used primarily to station soldiers, refueling jets, and cargo planes. Each airfield houses roughly 1,000 U.S. troops and civilian contractors.

The Shanghai Cooperation Organization (SCO) is an intergovernmental organization founded in Shanghai on 15 June 2001. The SCO currently comprises eight Member States (China, India, Kazakhstan, Kyrgyzstan, Russia, Pakistan, Tajikistan and Uzbekistan), four Observer States interested in acceding to full membership (Afghanistan, Belarus, Iran, and Mongolia) and six "Dialogue Partners" (Armenia, Azerbaijan, Cambodia, Nepal, Sri Lanka and Turkey).