Building through the Sierra Nevada Mountains was very difficult and dangerous. Temperatures were freezing during the winter and in one year alone there were 44 storms.There was the great danger of an avalanche for the men working through 18 feet of snow and camping on the tunnels beneath it. Creating tunnels through the mountains required blasting with nitroglycerin. Advancing at one foot of mountain at a time, a total of 11 tunnels was created.
The Afghanistan War took a heavy financial toll on the Soviet Union during the 1980s. Similar to the American invasion of Afghanistan in the early 2000s, the Soviets realized it to be very difficult to defeat an enemy when an invading force attempts to restructure another nation's government or eradicated a non-political force (such as the Mujaheddin or al-Qaeda). <span />
Archaeology is the answer
