The U.S. Marine who was relieved of his command after criticizing his superiors over their handling of Afghanistan has submitted his resignation, citing a "lack of trust and confidence" in military leaders. 

"I tender my resignation of commission in the U.S. Marine Corps, per the reference, and request an effective date of 11 September 2021," Lt. Col. Stuart Scheller said in his resignation letter, which is dated Tuesday. 

"My reason for submitting a letter of resignation: A lack of trust and confidence in your ability to lead."