| A | B |
|---|
| Selective Service Act | created the first national draft in May, 1917 |
| American Expeditionary Force | American troops who fought in France also known as doughboys |
| General John J. Pershing | American leader of the American Expeditionary Force |
| infantry | foot soldiers |
| 369th Regiment | African American troops who fought in France, Hell Fighters |
| combatants | those who physically fight a war |
| howitzers | large cannons |
| machine gun | could fire up to 600 bullets per minute |
| flamethrower | sprayed burning fuel on its target |
| trench warfare | digging in to hold a defensive position |
| chemical weapons | poison gas used to kill enemies |
| mustard gas | odorless gas that caused blisters and damage to lungs |
| airplanes | used mainly to spy on enemies, later used weapons for attacks |
| zepplins | gas-filled airships used as bombers |
| battleships | heavily armed and armored ships |
| convoy | Allied warships protected merchant ships |
| Meuse-Argonne Offensive | final push by the AEF that cut off German supply lines and brought an armistice |
| tank | mechanized mobile device used against trenches and infantry |
