A DoD definition of domestic extremism is on its way 1 day ago The "Countering Extremism Working Group" will create a new definition of prohibited behavior, while studying the incidence of extremism in the military. This photo was found in the online account of a soldier affiliated with the Neo-Nazi "Order of the Nine Angels" group. (iCloud) Now that the active-duty military has completed its mandated stand-downs to discuss domestic extremism, the Pentagon is lining up the next moves. After meeting with the service secretaries, Defense Secretary Lloyd Austin is standing up a domestic extremism working group, according to a memo released Friday.