Stationed
Occupancy
noun, する verb
Resident soldiers live in barracks when they've been stationed in another country. They have to serve their occupancy for a certain amount of time before they get to go back home.
ちゅうとん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
あそこには米軍が駐屯しているんだよ。
US armed forces are stationed over there.