occupier; occupying forces
Refers to a person, group, or military force that occupies a territory. Often used in political or historical contexts.
The occupiers imposed strict rules on the residents.
In history class, we learned about the resistance movement against the occupying forces.
侵略者 means 'invader' and emphasizes aggressive entry, whereas 占領者 focuses on the subsequent control and presence in the occupied area.
Compound of 占領 (occupation) + 者 (person). The word follows a common pattern for agent nouns.