The overall problem of right-wing extremism has dogged the military for decades and tends to be more severe when there is a rise in wider society.

It has gained new attention in the wake of the revelation that a retired senior Air Force officer allegedly took part in last Wednesday’s riot in the U.S. Capitol and a Navy veteran who also played a leading role was arrested over the weekend. Meanwhile, a rioter who was killed while trying to break into Speaker Nancy Pelosi’s office suite was also an Air Force veteran who espoused far-right and QAnon conspiracies.

In another sign of the challenge, the Army on Monday announced it was ousting a junior officer who was investigated for posting a video to his 3 million TikTok followers joking about Jews being exterminated in Nazi concentration camps.

The recent events are coming less than a month after the actin Defense secretary directed a review of Pentagon policies meant to address hate groups in the military, which will include recommendations for punishing those who take part in extremist activity.