| A | B |
|---|
| emperor | the male ruler of an empire |
| chain reaction | a series of events linked to one another |
| Central Powers | a group of allied nations that included Germany, Austria-Hungary, and later Turkey and Bulgaria |
| Allied Powers | a group of allied nations that included Great Britain, France, Serbia, Belgium, and Russia |
| submarine | a ship that can travel underwater |
| torpedo | a self-powered bomb that is show from a tube of a submarine or other ship |
| effective | able ot cause a desired result |
| standstill | something that is not changing or improving |
| consumer goods | objects and things the average person buys and uses |
| draft | the practice of selecting people to serve in the armed forces |
| mine | a bomb that floats in water and explodes when touched |
| conference | a meeting among a large group of people |
