The Philippine Defense Ribbon is awarded for combat service in the defense of the Philippines from 8 Dec 41 to 15 Jun 42, if the person was: 1) a member of the Bataan or Manila Bay forces or of a unit, ship, or airplane under enemy attack; or 2) assigned or stationed in Philippine waters for at least 30 calendar days during this period. A person who meets both conditions above is authorized to wear a bronze service star on the ribbon.