- The WW1 ended at 11 o'clock in the morning of the 11th day of the 11th month of 1918.
- WW1 transformed the U.S. into the largest military power in the world.
- The room of a WW1 French soldier is still untouched since 1918.
- A WW1 homing pigeon saved 194 men by delivering a message despite losing a leg, an eye and having been shot through the chest.
- Chemotherapy is a by-product of the mustard gas used in WW1.
- Nearly 13,000 Native Americans fought during World War I, despite not having a U.S. citizenship.
- The youngest soldier to serve during WW1 was only 8 years old.
- British soldiers in WW1 had a tea ration of six pints a day.
- Dogs were used as messengers in WW1, carrying orders to the front lines in capsules attached to their bodies.
- During WW1, the Belgian King personally led the army, the Queen served as a nurse, and the 14-year-old Prince enlisted as a private.
- A British prisoner of war, captured by the Germans in WW1, was freed to see his dying mother, then went back to the prison camp because he gave the Kaiser 'his word' he would return.
- The last surviving WW1 Veteran was a woman. She was a waitress at an air base.
- During WW1, a lone Portuguese soldier convinced the Germans that they were fighting against an entire unit.
- Teddy Roosevelt volunteered for service in World War I ten years after having served as U.S. president.
- One of the assassins of Archduke Franz Ferdinand threw a grenade but missed the car. He swallowed cyanide and jumped to the River Miljacka. The cyanide was expired and did not work, and the river was only 10cm deep. He was captured seconds later.
- During the World War I, the British Army attempted to train seagulls to poo on the periscopes of enemy submarines.
- The first and last British soldiers that died in WW1 are, by coincidence, buried 15 feet away from each other.
- Houdini drew on his arsenal of magician's tricks to provide special instructions to American troops during WWI.