An officer with the U.S. Navy is warning of a full-blown “national security threat” if the military moves ahead with its planned universal COVID-19 vaccination mandate, in a paper obtained exclusively by Revolver News.

In a memorandum released on Monday, Biden Secretary of Defense Lloyd Austin announced his intention to require a COVID-19 vaccination for all service members by mid-September, or immediately should any COVID vaccines clear FDA approval (the vaccines are currently only authorized for emergency use). Servicemen who refuse to submit to the vaccine will potentially face court martials, prison time, and even less-than-honorable discharge from the service.