Answer
Ungern was executed in Novonikolayevsk. After being captured by the Red Army in August 1921, Ungern was tried and convicted of high treason and executed by firing squad on September 15, 1921. Ungern's execution was carried out in a public square in Novonikolayevsk, and was witnessed by thousands of people. Ungern's body was then displayed in a local museum for several days before being buried in an unmarked grave.