Counterattack (newsletter)

Counterattack was a weekly subscription-based newsletter published from 1947 to 1955, with an emphasis on anti-communist content and organizing boycotts or other actions against those who were accused of communist associations or sympathies. The mimeographed newsletter was published by American Business Consultants, a "private, independent organization" started by three former agents of the Federal Bureau of Investigation.

Source: Wikipedia — Counterattack (newsletter) (CC BY-SA 4.0)