“The timing is extremely unusual,” Schwartz said in an interview Friday morning, confirming a memo announcing his ouster that was obtained by The Washington Post. During the inauguration, Schwartz will command not only members of the D.C. Guard but also 5,000 unarmed troops dispatched from across the country to help. He also will oversee military air support protecting Washington during the inauguration.
“My troops will be on the street,” said Schwartz, who turned 65 in October. “I’ll see them off, but I won’t be able to welcome them back to the armory.” He said he would “never plan to leave a mission in the middle of a battle.”

Head of D.C. National Guard to be removed from post in middle of inauguration - The Washington Post