| A | B |
| 1914-1919 | World War 1 |
| rival | one who tries to do better than another |
| allied powers | Allied nations of Gerat Britain, France, Russia, ltaly, and eventually, the United States and japan |
| Central Powers | Allied nation of Germany, Austria-Hungary, Turkey and Bulgaria |
| Barbed Wire | Wire that has sharp metal spikes on it |
| Trench | A long-narrow ditch |
| U-boat | A Geraman submarine |
| Convoy | A group of ships that travel together for protection |
| Unrestricted Warfare | War that is not restricted to a certain area or boundary |
| Reparation | Payment for war damage |
| League of Nations | A group of leaders from many naationss who met to solve problems between countries |
| bankrupt | at the end of the war, many |
| Generation | all the people born about the same time |
| total war | a war in which a country uses all its resources to win |
| world affair | an event, or happening, that takes place in the world and affects many countries |