The brief peaceful period of the caliphate of the Imam (as)...

The brief peaceful period of the caliphate of the Imam (as) lasted for four to five months. Hafiz Dhahabi writes in the book 'Al'Abar' that Imam Hasan (as) had marched for war in Rabi II, 41 A.H. accordingly, this period would be six months.

So, if the duration of war is taken as one and a half months and the period of the caliphate of the Imam (as) is taken as six months and few days, still a duration of four to five months remains, though according to some other narrations the peaceful period of the caliphate of the Imam (as) would be more than that. During this period, the religious group which was loyal to his illustrious father started pressing him for war against Muawiya. Ibn. Abbas, his father'