| Date | Event | Lanes | Status |
|---|
| 1942-06-13 | Office of Strategic Services Created, Wall Street Lawyers Build Intelligence Apparatus
3 src William Donovan · Franklin D. Roosevelt · Allen Dulles · Wall Street | | confirmed |
| 1941-12-07 | FBI Pre-Pearl-Harbor Japanese-American Dossier System Provides Internment Target Lists
3 src J. Edgar Hoover · Federal Bureau of Investigation · Franklin D. Roosevelt |
| confirmed |
| 1939-09-06 | Roosevelt Proclamation Consolidates All Domestic Intelligence Under FBI, Creating Peacetime Intelligence Monopoly
2 src Franklin D. Roosevelt · J. Edgar Hoover · Federal Bureau of Investigation | | confirmed |
| 1936-08-24 | Roosevelt Secret Oral Directive Authorizes FBI General Intelligence Without Statutory Basis
3 src Franklin D. Roosevelt · J. Edgar Hoover · Federal Bureau of Investigation | | confirmed |
| 1935-07-01 | Bureau of Investigation Formally Renamed Federal Bureau of Investigation, Professionalization Era Begins
2 src J. Edgar Hoover · Federal Bureau of Investigation · Franklin D. Roosevelt · Homer Cummings | | confirmed |
| 1930-04-30 | Army Signal Intelligence Service Founded Under Friedman, Institutional Ancestor of NSA
3 src | | confirmed |
| 1929-10-31 | Stimson Closes Yardley's Black Chamber, Briefly Interrupting U.S. Peacetime Signals Intelligence
3 src State Department | | confirmed |
| 1924-05-10 | Hoover Named Acting Director of Bureau of Investigation, Begins 48-Year Tenure
3 src J. Edgar Hoover · Harlan Fiske Stone · Bureau of Investigation · Calvin Coolidge |
| 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 |
| 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 |
| 1917-04-20 | Justice Department Authorizes American Protective League, 250,000-Member Vigilante Surveillance Network
3 src Bureau of Investigation · Woodrow Wilson |
| confirmed |
| 1917-01-16 | British Intercept Zimmermann Telegram, Demonstrating Value of Signals Intelligence to U.S. Policy
2 src Woodrow Wilson | | confirmed |
| 1916-07-30 | German Sabotage Destroys Black Tom Munitions Depot, Exposes U.S. Counterintelligence Vacuum
2 src Bureau of Investigation | | confirmed |
| 1908-07-26 | Bonaparte Creates Bureau of Investigation Inside DOJ, Bypassing Congressional Opposition
3 src Theodore Roosevelt · Department of Justice · Bureau of Investigation | | confirmed |
| 1892-01-01 | Pinkerton Detective Agency Operates as Private Corporate Army Against Unions
3 src Pinkerton National Detective Agency · Allan Pinkerton · Corporate employers · Labor unions |
| confirmed |
| 1861-04-21 | Pinkerton Heads Union Intelligence Service for McClellan, First Federal Use of Private Intelligence Personnel
2 src Allan Pinkerton · Pinkerton National Detective Agency · Abraham Lincoln | | confirmed |
| 1850-08-22 | Allan Pinkerton Founds North-Western Police Agency, Precursor to Private Intelligence State
2 src Allan Pinkerton · Pinkerton National Detective Agency |
| confirmed |