Maryland Code, Public Safety § 13-208

(1) trespasses on a camp ground, parade ground, armory, or other place devoted to that duty;

(2) disrupts in any way the orderly discharge of duty by those under arms; or

(3) interrupts or prevents the passage of troops going to or returning from duty.

(1) the sale or use of alcoholic beverages;

(2) huckster or auction sales; and

(3) gambling.