The Medal for Gallantry (MG) is a military decoration awarded to personnel of the Australian Defence Force. It recognises acts of gallantry in action in hazardous circumstances. The MG was introduced on 15 January 1991, replacing the Imperial equivalent. It is ranked third in the Gallantry Decorations in the Australian Honours System. Recipients of the Medal of Gallantry are entitled to use the post-nominal letters "MG".