From the thesis abstract: "As the military moves into the 21st century its focus is outward to meet a foreign threat. The growing number of militias and racial extremist in this country, that are advocating violence and the overthrow of our government, will demand that in the 21st century the military will have to look inward to meet a domestic threat. [... The 1990's] have seen a large increase in the number of Militias, Patriot movements, and religiously founded extremist, both black and white, in America. It is estimated that there are over 441 militias and 368 Patriot groups, involving by some accounts, up to five million people. The main drive behind these movements has been a growing dissatisfaction with how our government is being run and economic hardship. Most of the Militias have formed because of the fear that the United States government is being taken over by the United Nations under the auspices of the 'new world order.' The members of the militia feel they must stand up their armies and stop the take over, to protect our country. Two recent events have fueled the fires of militia mania. They are: the stand off at Ruby Ridge, Idaho and the attack on the Branch Davidian compound in Waco, Texas. Unfortunately the threats of violence are no longer just talk as shown by the Oklahoma City bombing, and the increase of militia involvement in crime to support their cause."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/