A civilian contractor working with the U.S. armed forces in Afghanistan was spotted in a video wearing a “Kekistan” flag patch.

The man, who officials declined to identify, has been fired after video footage posted online this week showed him wearing a white nationalist “Kekistan” flag patch on his helmet. It later became clear that he worked for the Virginia-based aviation consultant company MAG Aerospace and was “immediately terminated for a violation of company standards”.

“The wearing of the Kekistan flag is a form of partisan political activity and wearing it while on duty, violated the Department of Defense policy,” Debra Richardson, spokeswoman for U.S. forces in Afghanistan, said.

The “Kekistan” flag originated as a joke in racist 4chan chat rooms and intentionally mimics the design of the German Nazi war flag, representing a fictional country made up of alt-right white nationalists who are supposedly oppressed by the rampant political correctness of the Western world.

Earlier this week, the footage showing U.S. and Afghan aircrews training to fly a UH-60 helicopter in Kandahar was posted to the website of the Defense Visual Information Distribution Service, which produces videos for the Department of Defense. Although DVIDS removed the video from its website a version of the video was posted to YouTube.

“White nationalists have waved the Kekistan flag at racist rallies across the country in recent years, including at the deadly 2017 rally in Charlottesville, Virginia,” HuffPost reports.

Nothing to see here. Just a contractor (?) training Afghan UH-60 crews with a Kekistan flag patch on his helmet. Full, official USAF video here: https://t.co/uN00QVHobh pic.twitter.com/AOMRcYVR0u — Joseph Trevithick (@FranticGoat) September 23, 2018

White nationalism isn’t only a problem among the ranks of private contractors hired by the U.S. military. In 2017, a survey published by the Military Times found that 25 percent of active-duty service members in the U.S. armed forces said they have encountered white nationalists in their own ranks.

Earlier this year, a ProPublica report exposed an active-duty Marine as having connections to the neo-Nazi group Atomwaffen, and for having participated in the violence at the white supremacist rally in Charlottesville.