The World War I Croix de guerre was established by royal decree on 25 October 1915 as an award for bravery or other military virtue on the battlefield. It was only awarded to individuals. The Croix de guerre was not only awarded for bravery but also for three years or more of service on the front line, or for good conduct on the battlefield. It was also awarded to volunteers older than 40 or younger than 16 after a minimum of 18 months of service, to escaped prisoners of war rejoining the armed forces, and to military personnel who were placed on inactive duty because of injury.