During that time Mu'5wiyah...

During that time Mu'5wiyah, who was a bitter enemy of `Ali and his family and had fought for years with the ambition of capturing the caliphate, first on the pretext of avenging the death of the third caliph and finally with an open claim to the caliphate, marched his army to Iraq, the seat of Imam Hasan's caliphate.

War ensued during which Mu'awiyah gradually subverted the generals and commanders of Imam Hasan's army with large sums of money and deceiving promises until the army rebelled against Imam Hasan. Finally, the Imam was forced to make peace and to yield the caliphate to Mu'awiyah, provided it would again return to Imam Hasan after Mu’awiya’s death and the…