occupation forces; occupation army
Refers to military forces occupying a territory, especially in historical contexts such as post-WWII Japan.
占領軍は1945年に日本に上陸した。
The occupation forces landed in Japan in 1945.
占領軍の政策は戦後復興に大きな影響を与えた。
The policies of the occupation army had a major impact on postwar reconstruction.