The
Tang campaign against Kucha was a military campaign led by the
Tang Dynasty general Ashina She'er against the
Tarim Basin oasis state of
Kucha in
Xinjiang, which was aligned with the
Western Turkic Khaganate. The campaign began in 648 and ended on 19 January 649, after the surrender of the Kuchan forces following a forty-day siege in
Aksu. Kuchean soldiers tried to recapture the kingdom with the assistance of the
Western Turkic Khaganate, but were defeated by the Tang army.