noun
Gapsin Coup (Korea, 1884)
Historical term referring to the failed coup d'état in Korea in 1884.
甲申事変は1884年に朝鮮で起きたクーデターです。
The Gapsin Coup was a coup d'état that occurred in Korea in 1884.
The term is composed of 甲申 (the 21st year of the sexagenary cycle, corresponding to 1884) and 事変 (incident, coup). The derivation is straightforward from the historical date.