World War I
| By: | Chris Oxlade |
| Publisher: | Encyclopaedia Britannica, Inc. |
| Print ISBN: | 9781615356072 |
| eText ISBN: | 9781615356072 |
| Edition: | 1 |
| Copyright: | 2012 |
| Format: | Page Fidelity |
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World War I explores the secrets of World War I. As in all wars, each side needed to keep secrets from the enemy. At the same time, they tried to discover the enemy's secrets, using spies and code-breakers.