Lt. Col. Paul Douglas Hauge, a 19-year Army veteran, resigned over the Biden administration’s recent COVID-19 vaccine mandate. His resignation letter gained attention on social media after his wife shared it on Twitter.

“I am incapable of subjecting myself to the unlawful, unethical, immoral and tyrannical order to sit still and allow a serum to be injected into my flesh against my will and better judgment,” Hague wrote.

The colonel listed several reasons for his resignation, including a “complete lack of confidence in the presidential administration and secretaries directing the military,” citing the widely-panned withdrawal of US troops from Afghanistan.

Another reason Hauge listed as “an ideologically Marxist takeover of the military and United States government at their upper echelons.”

With Hauge’s voluntary separation, he will not be eligible for separation or retirement pay.