Stationed Troops, Occupying Troops
noun
A resident detained in a location who is in the army is a member of the stationed troops at this location. They could also be the occupying troops as well.
ちゅうりゅうぐん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
駐留軍向けの洗濯サービスとかはありますか？
Is there a laundry service for the stationed troops?