Abstract: Methods and apparatuses can be configured to facilitate the guarding of doors to replace the need for a lock or to supplement a lock to help bar access to a room via a door. Embodiments of the apparatus can be configured as a door guard. The door guard can be mountable adjacent a door and be configured for attachment to a door via a mounting device attached to a rear of a door so that a door guard can be positioned quickly in the event of an unanticipated emergency situation. The door guard may block opening of a door outward out of a room and into an adjoining hallway of a building by preventing extending to opposite sides of a door frame or walls defining the door opening to prevent an attacker from pulling the door open.