Original sentence: Operation Paul Bunyan was a countermeasure taken by the United States Army Corps of Engineers in response to an attack by North Korean soldiers in the village of Panmunjeom within the Korean Demilitarized Zone
Edited sentence: Operation Paul Bunyan was a countermeasure taken by the United States Army Corps of Engineers in response to an unprovoked attack by North Korean soldiers in the village of Panmunjeom within the Korean Demilitarized Zone