Belligerent
A belligerent (lat. bellum gerere, "to wage war") is an individual, group, country, or other entity that acts in a hostile manner, such as engaging in combat. Belligerent comes from Latin, literally meaning "one who wages war". Unlike the use of belligerent as an adjective to mean aggressive, its use as a noun does not necessarily imply that a belligerent country is an aggressor.