It is also generally held that if the war did not produce an outright defeat for China , it was a costly mistake fought for dubious purposes , high among them punishing Vietnam for overthrowing the Khmer Rouge leader of Cambodia , Pol Pot , a Chinese ally who was one of the 20th century 's bloodiest tyrants .
Pol Pot
Cambodia
/people/person/nationality
Pol Pot
Cambodia
/people/deceased_person/place_of_death
LOCATION
China
LOCATION
Vietnam
LOCATION
Cambodia
PERSON
Pol Pot