The National Defense Service Medal is a military award established by the United States in 1953. It is given to members of the U.S. Armed Forces who have served honorably during designated time periods of national emergency or conflict. The medal recognizes service during times when the nation is engaged in military operations or when a national emergency has been declared. Eligible service periods for the medal include various conflicts, such as the Vietnam War, the Gulf War, and the War on Terror. The medal features a bronze star and is worn on the uniform to signify the recipient's commitment to national defense.