Aggressor

Etymology
From.

Proper noun

 * 1) a fictional state created by the United States Army for maneuver and military exercise purposes in the 1950's
 * In recent years the Aggressor Homeland has been modifying its logistical organization and procedures in an effort to meet the requirements of mobile and fast-moving forces in modern warfare. (Handbook on Aggressor: Field Manual, United States Department of the Army, June 1973)

Noun

 * 1) a citizen/subject of the fictional Aggressor state

Noun

 * 1) aggressor