Gordon's War (1973)

Synopsis
In this incredibly violent actioner, a soldier returns from the war in Vietnam and finds that his Harlem neighborhood has become a drug-filled war zone of its own. The final straw comes when his wife overdoses. The grief-stricken vet quickly assembles a group of vigilantes to clean up the streets and exact vengeance upon the drug dealers who sold his wife the bad stuff. ~ Sandra Brennan, All Movie Guide