Md. Code, Public Safety § 13–403

(a) To maintain an appropriate organization and to assist in instruction and training, the President of the United States may:

(1) assign the National Guard to divisions, brigades, and other tactical units; and

(2) detail officers from the National Guard or the United States Army or Air Force to command those units.

(b) A commanding officer of a complete unit organized in the State may not be displaced under this section.