In the month of Muharram 61 AH (approx. 20 October 680 AD), an event took place in Iraq at a place known as Kerbala on the bank of the river Euphrates. It seemed in those days insignificant from the historical point of view. A large army which had been mobilised by the Umayyad regime besieged a group of persons numbering less than a hundred and put them under pressure to pay allegiance to the Caliph of the time and submit to his authority. The small group resisted and a severe battle took place in which they were all killed.