FBI File: House Committee on Un-American Activities (HUAC)

From 1938 through 1975, the House Committee on Un-American Activities and the FBI developed a working relationship that both increased the power of the committee and gave the bureau another means of investigating suspected Communists. This file, which contains hundreds of reports centered on HUAC’s major investigations, is divided into three parts: 1938-1945 covers clashes between HUAC chairman Martin Dies and the Roosevelt and Truman administrations; 1946-1969 records the process by which the FBI and HUAC chose their targets; the last section follows HUAC, renamed the Internal Security Committee, in its attempt to protect the FBI from other congressional investigative committees.