Fortress-3 Tunnel:
A small country fell under the iron rule of a dictator. The dictator ruled the country from a strong fortress. The fortress was situated in the middle of the country, surrounded by farms and villages. Many roads radiated outward from the fortress like spokes on a wheel. A great general arose who raised a large army at the border and vowed to capture the fortress and free the country of the dictator. The general knew that if his entire army could attack the fortress at once it could be captured. His troops were poised at the head of one of the roads leading to the fortress, ready to attack. However, a spy brought the general a disturbing report. The ruthless dictator had planted mines on each of the roads. The mines were set so that small bodies of men could pass over them safely, since the dictator needed to be able to move troops and workers to and from the fortress. However, any large force would detonate the mines. Not only would this blow up the road and render it impassable, but the dictator would then destroy many villages in retaliation. 
	The general, however, was undaunted. He and his men dug an underground tunnel beneath the mines following the route of the road to the fortress. When the tunnel was dug, the men crawled through it until they arrived safely at the foot of the fortress. Here they all gathered together and attacked the fortress in full strength. In this way, the general was able to capture the fortress and overthrow the dictator.