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.
| ISBN: | 9781615356072 |
| Publication date: | 10th January 2012 |
| Author: | Oxlade, Chris |
| Publisher: | Britannica Digital Learning |
| Format: | Ebook |