World War I: Bullets
- A collie of royal ancestry became the mascot of American soldiers. Before he joined the army this pedigreed collie bore the name of Bum. As the unit mascot he answered to the more appropriate name of Bullets.
- Messenger dog with its handler, in France, during World War I. This collie worked as a messenger in the front line under constant gunfire. A scrolled up message can be seen attached to his collar.
- Messenger dog wearing a gas mask during World War I