The following documents were obtained from the Department of the Army. The Army authorities monitored political and social activities within the United States from around the 1910s all the way into the 1960s.
As a result, the intelligence was forwarded to multiple law enforcement agencies, and kept for decades, especially the FBI.
Below is a sampling of the reports, and more FOIA requests have been filed for additional records.
Army Surveillance of Civilians (1972) [104 Pages, 8.88mb] Source: The Memory Hole (Original thanks to Susan Maret, coeditor of Government Secrecy: Classic and Contemporary Readings.) Document verified 12/18/2011
Weekly Summary of Domestic Intelligence (April 10, 1952) [38 Pages, 4.75mb]