土木之役 tǔmù zhī yì

tǔmù zhī yì proper noun Tumu Crisis; Crisis of Tumubao; Battle of Tumu Fortress
Domain: History 历史 , Subdomain: China , Concept: Battle 战争
Notes: (1449) The wipe out of the entire Ming military force and capture of Emperor Zhengtong at Tumubao during a northern campaign during to Western Mongolia