- Underground Movement
About 1510 A.D. the Turks were besieging Vienna. They assaulted the walls of the city with all their might but to no avail. The walls held and other means had to be taken by the ingenious invaders to take the stronghold. They hit upon an underground movement-they decided to tunnel under the walls. This had to be a night job, of course. Drilling and moving the dirt-shift after shift of soldiers worked on the project…