Scholars of extremism and law enforcement officials have long warned about the risks of white nationalists serving in the armed forces

Christopher Mathias, After HuffPost Investigation, 4 White Nationalists Out of U.S. Military--But Others Allowed to Remain. HuffPost, 7 August 2019.

In March and April, HuffPost published two reports identifying 11 servicemen who belonged to Identity Evropa, the white nationalist group best known for helping organize the deadly 2017 “Unite the Right” white supremacist rally in Charlottesville, Virginia.

In a separate report in May, HuffPost confirmed that the Army was investigating a 12th soldier for his alleged ties to the Atomwaffen Division, a neo-Nazi terror group that has been connected to five murders in the U.S. over the past two years.

The danger of white nationalist terror was brought into devastating focus this week after a gunman who reportedly held white nationalist views massacred 22 people in a Walmart in El Paso, Texas. The man arrested in that attack does not appear to have any connections to the U.S. military. However, the serviceman with possible connections to the Atomwaffen Division is still stationed at Fort Bliss in El Paso, and is among the four who the Army has determined are still fit to serve.

Here is a link to Military Personnel and Extremism: Law, Policy, and
Considerations for Congress by K. N. Kamarck, Congressional Research Service.

Here is a link to the NBC News piece, Inside the U.S. military's battle with white supremacy and far-right extremism, from May 2019.

Here is a link to WHY CAN'T THE MILITARY ROOT OUT FAR-RIGHT EXTREMISM IN ITS OWN RANKS? From Pacific Standard, April 2019. (Note, the Navy added Article 1167, U.S. Navy Regulations that included a prohibition against participating in any organization that "espouses extremist causes," in 1997.

Here is a link to DOES THE AMERICAN MILITARY HAVE A PROBLEM WITH FAR-RIGHT EXTREMISM? From Pacific Standard, by C. Jones, March 2019.

Here is a link to S. G. Jones, The Rise of Far-Right Extremism in the United States, a Report from the Center for Strategic & International Studies, Nov. 2018.