Pinkerton Detective Agency

La Follette Civil Liberties Committee Begins Investigation Exposing Corporate Union-Busting and Industrial Espionage

| Importance: 8/10

The Senate Subcommittee on Education and Labor, chaired by Senator Robert M. La Follette Jr. of Wisconsin, begins hearings on June 6, 1936, launching a four-year investigation that systematically exposes the violent and illegal tactics American corporations use to suppress union organizing. The La …

Robert La Follette Jr. U.S. Senate Pinkerton Detective Agency Burns Detective Agency Republic Steel +3 more labor-rights corporate-surveillance union-busting congressional-investigation private-security
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La Follette Committee Exposes Pinkerton and Burns Detective Agencies' Massive Labor Espionage Network

| Importance: 7/10

The La Follette Civil Liberties Committee subpoenas records from major private detective agencies in early 1936, exposing the vast scale of corporate labor espionage in American industry. The investigation reveals that the Pinkerton National Detective Agency, Burns International Detective Agency, …

La Follette Committee Pinkerton Detective Agency Burns Detective Agency Corporations Service Bureau Railway Audit and Inspection Company +2 more labor-surveillance corporate-espionage union-infiltration private-security labor-rights
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Anti-Pinkerton Act: Congress Limits Private Armies After Homestead Violence

| Importance: 7/10

Congress passed the Anti-Pinkerton Act following public outrage over the Homestead Strike massacre, prohibiting the federal government from hiring “an individual employed by the Pinkerton Detective Agency, or similar organization.” The legislation addressed “Congressional concern …

U.S. Congress Pinkerton Detective Agency labor-rights legislative-reform corporate-accountability gilded-age
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Coeur d'Alene Miners Strike Violence Triggers Martial Law, 600 Imprisoned Without Trial

| Importance: 8/10

Violent confrontation erupts between striking silver and lead miners and company guards at mines in Coeur d’Alene, Idaho, after union workers discover a Pinkerton agent has infiltrated their organization and routinely provided confidential union information to mine owners. The violence follows …

Western Federation of Miners Pinkerton Detective Agency Idaho National Guard U.S. Army General J.M. Schofield +2 more labor-suppression gilded-age mining-industry martial-law federal-intervention +1 more
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Homestead Strike Battle Between Workers and Pinkerton Agents Leaves 10 Dead

| Importance: 9/10

Three hundred Pinkerton Detective Agency agents attempt to forcibly seize Andrew Carnegie’s Homestead steel mill in Pennsylvania, triggering a 14-hour armed battle with locked-out steelworkers that leaves seven workers and three Pinkertons dead, with dozens more wounded. The violent …

Andrew Carnegie Henry Clay Frick Pinkerton Detective Agency Amalgamated Association of Iron and Steel Workers Pennsylvania National Guard +1 more labor-suppression gilded-age homestead-strike private-security corporate-violence +1 more
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Black Thursday: Mass Execution of Molly Maguires Based on Pinkerton Infiltration

| Importance: 8/10

Ten Irish-American coal miners were hanged in Pennsylvania on “Black Thursday,” the first mass execution in a coordinated corporate-state campaign against labor organizing. In 1873, Reading Railroad President Franklin B. Gowen hired the Pinkerton Detective Agency to infiltrate the Molly …

Pinkerton Detective Agency Franklin B. Gowen Philadelphia & Reading Railroad James McParlan Pennsylvania Courts labor-suppression corporate-power judicial-corruption gilded-age institutional-capture
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