Signals intelligence of World War I

Signals intelligence (SIGINT) during World War I involved the interception and analysis of enemy communications, primarily through telegraphy, radio, and other electronic means. While SIGINT as a formalized practice was not as advanced as it would become in later conflicts, it played a significant role in the war. ### Key Aspects of SIGINT in World War I: 1. **Telegraphy**: Before the widespread use of wireless communication, telegraph lines were pivotal for military communication.