Shir Muhammad-bek Gazi, also known as Mahmud-Bek also known under the nickname Korshirmat (1895, Garbaba, Fergana - March 10, 1970) was a prominent figure of the Basmachi Movement in exile since 1923, the first head of the Turkestan Union during the Great Patriotic War with the support of the Abwehr to restore the insurrectionary movement in Turkestan.