noun
military station; post
Refers to a place where troops are stationed, such as a garrison or military post.
その部隊は駐屯所に戻った。
The unit returned to the military station.
Compound of 駐屯 (ちゅうとん, 'stationing of troops') and 所 (じょ, 'place'). The exact historical derivation is uncertain, but the components directly reflect the meaning.