| 1960-01-01 | U.S. Chamber of Commerce Reaches 2.5 Million Members Through Anti-Communist Mobilization
3 src U.S. Chamber of Commerce · American Legion |
| confirmed |
| 1957-06-17 | Yates v. United States Limits Smith Act Prosecutions, Supreme Court Begins Retreat from McCarthyism
6 src Earl Warren · U.S. Supreme Court · Communist Party USA · Department of Justice | | confirmed |
| 1954-12-02 | Senate Votes 67-22 to Censure Joseph McCarthy Ending Four Years of Terror
3 src Joseph McCarthy | | confirmed |
| 1954-09-01 | Communist Control Act Bans Party Members from Union Leadership, Weaponizing Anti-Communism Against Labor
3 src U.S. Congress · Dwight D. Eisenhower · House Un-American Activities Committee · American Federation of Labor · +1 | | confirmed |
| 1954-06-09 | Joseph Welch Confronts McCarthy with Have You No Sense of Decency in Army Hearings
3 src Joseph McCarthy · Roy Cohn | | confirmed |
| 1954-04-12 | AEC Security Hearing Against Oppenheimer Begins Targeting Manhattan Project Director
3 src J. Edgar Hoover | | confirmed |
| 1953-06-19 | Julius and Ethel Rosenberg Executed at Sing Sing, Cold War's Most Controversial Death Penalty Case
3 src Roy Cohn · J. Edgar Hoover · Federal Bureau of Investigation · Dwight D. Eisenhower |
| confirmed |
| 1952-01-01 | Hollywood Blacklist Reaches Peak with Over 300 Industry Professionals Banned
3 src House Un-American Activities Committee · American Legion · Federal Bureau of Investigation · J. Edgar Hoover |
| confirmed |
| 1951-06-04 | Dennis v. United States Supreme Court Upholds Smith Act Convictions, Criminalizes Political Advocacy
3 src Fred Vinson · U.S. Supreme Court · Communist Party USA · Department of Justice |
| confirmed |
| 1951-03-29 | Julius and Ethel Rosenberg Convicted of Espionage in Controversial Red Scare Trial
3 src Roy Cohn | | confirmed |
| 1950-09-23 | McCarran Internal Security Act Passes Over Truman Veto, Codifies Red-Scare Surveillance Apparatus
3 src Harry S. Truman · Federal Bureau of Investigation · Communist Party USA |
| confirmed |
| 1950-09-23 | McCarran Internal Security Act Passes Over Truman Veto, Requires Communist Registration
3 src Harry Truman · U.S. Congress · House Un-American Activities Committee · Department of Justice · +2 |
| confirmed |
| 1950-09-01 | State Loyalty Oaths Spread as California Passes Levering Act, Requires Public Employee Pledges
3 src California Legislature · Earl Warren · American Civil Liberties Union |
| confirmed |
| 1950-08-01 | State Department Revokes Paul Robeson Passport for Political Views and Soviet Support
3 src State Department · J. Edgar Hoover · Federal Bureau of Investigation | | confirmed |
| 1950-06-22 | Red Channels Published, Launching Broadcasting Blacklist and Corporate "Smear and Clear" Racket
3 src NBC · CBS |
| confirmed |
| 1950-06-01 | Margaret Chase Smith Delivers Declaration of Conscience Against McCarthy Witch Hunt
3 src Joseph McCarthy | | confirmed |
| 1950-02-09 | McCarthy Wheeling Speech Claims 205 Communists in State Department Launching Witch Hunt
3 src Joseph McCarthy · Harry S. Truman | | confirmed |
| 1950-01-01 | Corporate Anti-Communist Network Coordinates Labor Suppression Through NAM, Chamber of Commerce Infrastructure
12 src National Association of Manufacturers · U.S. Chamber of Commerce · American Legion · House Un-American Activities Committee | | confirmed |
| 1949-11-15 | CIO Expels United Electrical Workers and Farm Equipment Workers, Beginning Purge of Communist-Led Unions
3 src Congress of Industrial Organizations · Philip Murray · Walter Reuther · House Un-American Activities Committee | | confirmed |
| 1948-08-03 | Alger Hiss Testifies Before HUAC as Whittaker Chambers Accuses Him of Espionage
3 src Richard Nixon · House Un-American Activities Committee | | confirmed |
| 1947-11-25 | Waldorf Statement Launches Hollywood Blacklist, Studio Executives Pledge to Fire Hollywood Ten
3 src Paramount Pictures |
| confirmed |
| 1947-10-20 | HUAC Hollywood Hearings Begin, Studio Executives Cooperate as "Friendly Witnesses"
6 src House Un-American Activities Committee · Ronald Reagan |
| confirmed |
| 1947-10-01 | Federal Loyalty Program Implementation Creates Permanent Political Background-Check Regime
3 src Harry S. Truman · Federal Bureau of Investigation |
| confirmed |
| 1947-06-23 | Anti-Communist Loyalty Oaths and Taft-Hartley Act Weaponized to Crush Labor Movement
6 src CIO · AFL | | confirmed |
| 1947-03-21 | Executive Order 9835 Establishes Federal Loyalty Program - 5 Million Screened, Guilt Presumed
4 src Harry S. Truman · Federal Bureau of Investigation · House Un-American Activities Committee |
| confirmed |
| 1945-01-03 | HUAC Made Permanent Standing Committee, Institutionalizes Political Persecution
3 src U.S. House of Representatives · House Un-American Activities Committee |
| confirmed |
| 1940-06-28 | Smith Act Criminalizes Advocacy of Government Overthrow, Enables Political Persecution
3 src U.S. Congress · Department of Justice · Franklin D. Roosevelt | | confirmed |
| 1938-05-26 | Dies Committee (HUAC) Formed by Conservative Democrats to Discredit New Deal as Communist Infiltration
3 src U.S. House of Representatives · Franklin D. Roosevelt | | confirmed |
| 1927-08-23 | Sacco and Vanzetti Executed After Seven Years of Biased Proceedings
3 src |
| confirmed |
| 1925-06-08 | Supreme Court Upholds Criminal Anarchy Conviction While Expanding Due Process
3 src U.S. Supreme Court |
| confirmed |
| 1920-08-23 | Sacco and Vanzetti Arrested in Red Scare Climate of Anti-Immigrant Hysteria
3 src Department of Justice |
| confirmed |
| 1920-05-28 | 'Report Upon the Illegal Practices of the United States Department of Justice' Repudiates Palmer Raids
2 src A. Mitchell Palmer · J. Edgar Hoover |
| confirmed |
| 1920-01-02 | Palmer Raids Escalate with Coordinated Mass Arrests Across 33 Cities
5 src A. Mitchell Palmer · J. Edgar Hoover · Department of Justice | | confirmed |
| 1919-11-07 | Palmer Raids Begin: Attorney General and J. Edgar Hoover Arrest 6,000 in 36 Cities, Deport 249 on "Soviet Ark"
4 src A. Mitchell Palmer · J. Edgar Hoover · U.S. Department of Justice |
| confirmed |
| 1919-08-01 | Hoover Named to Lead Justice Department Radical Division, Origin of Permanent Political Dossier System
3 src J. Edgar Hoover · A. Mitchell Palmer · Department of Justice |
| confirmed |
| 1886-05-04 | Haymarket Affair Bombing and Police Violence Trigger Massive Anti-Labor Backlash
4 src Chicago Police Department · Knights of Labor |
| confirmed |