Between 1400 A.D. and 1800 A.D., three important Muslim empires emerged in Eastern Europe. Using powerful armies, these empires were able to conquer vast stretches of territory. These Muslim empires helped to strengthen Islam in the lands they controlled, and bring stability and economic growth.
These empires were the Ottoman Empire, the Persian Empire, and the Mongul Empire.
The definition of insanity is doing the same thing over and over and expecting different results.
Spartacus was an escaped Roman slave who led an army of 90,000 escaped slaves against the might of the Romans.