History20th century (1956-1975)United Stateslow confidence

The Church Committee found that the FBI attempted to damage civilian groups through smear campaigns and harassment.

Notes on verification

Well-documented by the Church Committee's official findings and corroborated by multiple independent, reputable sources including Britannica, GlobalSecurity.org, and contemporary journalism. COINTELPRO's tactics are historically established fact. [cascade flags: aggregator_dropped_primary_exists,wikipedia_dropped_other_sources_exist | tier=unverified indep_score=0.3 clusters=2 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]

Sources