noun
occupying forces; occupation troops
Historically refers to the Allied forces occupying Japan after World War II. Can be used more broadly for any occupying military force, but the primary association is with the post-war occupation.
進駐軍が日本に駐留していた時代を覚えている人は少なくなった。
Fewer people remember the era when the occupying forces were stationed in Japan.
この建物はもともと進駐軍の宿舎として使われていた。
This building was originally used as quarters for the occupation troops.