A 35-mile network of tunnels stretches around the two and a half square miles of land occupied by the rock of Gibraltar. Most of which were created during WWII, yet still maintaining a purpose in modern British Defence. The intention was to create a fortification, protecting the peninsula from invasion. This British Territory was designed to be self-sufficient, and the project was designed to facilitate the garrison to live underground, resisting a siege. In modern day, the tunnelling system serves as a training ground for the MOD, providing an environment similar to the Tora-Bora Hills of Afghanistan. Troops can train in darkness, and use the giant network to simulate a variety of unpredictable combat situations.
