A 15th century Mongolian prince of the Oirad horde. He was granted the title "Taisi" by the Chinese Ming Dynasty. This article needs to be cleaned up to conform to a higher standard of quality. ...
Famous for capturing the Zhengtong Emperor after the Battle of Tumu Fortress. Zhu Qizhen (November 29, 1427–February 23, 1464) was an emperor of the Ming Dynasty. ... The Tumu Crisis (Chinese: 土木之變; pinyin: Tŭmù zhī bìan); also called Crisis of Tumubao (土木堡之變); or Battle of Tumu (土木之役), was frontier conflict between Mongolia and the Chinese Ming Dynasty leading to the capture of Zhengtong Emperor on September 8, 1449 by an utterly wrong deployment. ...
EsenTayisi was a 15th century prince of the Oirat (also known as the Kalmyks), best-known for capturing the Zhengtong Emperor after the Battle of Tumu Fortress.
Esen actually waited to present this ransom demand, as well, not doing so until he could bring a more substantial force to the vicinity of Peking, and taking fully six weeks from the time of the emperor's capture to effect that deployment.
EsenTayisi was slain in 1454, the year following his assumption of the title of khan, by the son of a political opponent whom Esen had had killed.