That is why the residents of Kufa had...
That is why the residents of Kufa had, in the beginning, decided to remain neutral in the camel ('Jamal') war and the religious group had not succeeded in their efforts until the arrival of Imam Hasan (as), who succeeded, after long discussion, in recruiting twelve thousand soldiers for the army, though forty thousand soldiers were present there at the time. During the caliphate of Imam Hasan (as), another group, known as 'Khawarij' had gained considerable influence in Kufa.
These persons had become the enemies of Hazrat ‘Ali (as) after the Siffin war and had particular, specific ideas. It is said that their speeches used to swiftly influence the thinking of the people who were accepting their ideas. The common people were confused, being divided into these three groups. Due to the varying views, ideas and opinions, they were unable to decide who was right and who was wrong!
For further understanding the conditions prevailing at the time of the caliphate of Imam Hasan (as), three points should be well understood: After crushing the internal rebellion of the camel ('Jamal') war, Hazrat ‘Ali (as) decided in 36 A.H. to declare Kufa as the capital. There is no doubt that this was a major step in the history of Kufa. The historical records do not reflect any clear reason for this decision.
No historian has given any indication that the Imam (as) wished, before the 'Jamal' war, to announce the shifting of the capital to Kufa. However, some researchers have written that when the Imam (as) heard the news of the death and destruction by the rebellious group in Basra, he was busy at the time in preparing for war against the insurgents of Syria. But, realizing the nature of the rebellion, he had to postpone the earlier war plans and to march towards Basra.
After restoring peace in Basra, his first priority was to bring the Syrian insurgents back on the right path as directed by Almighty Allah and to fight them, as ordered by the Holy Prophet (saws). From a military point of view, Kufa was an ideal location where a large Muslim army was present and soldiers from other areas could also be gathered there. Moreover, he could also contain the internal and external conspiracies which had been hatched against the Muslims and reached a city like Kufa.
One link of these conspiracies was the 'Jamal' war itself which had been planned by the Syrian rebellious group, and was difficult to control from Madina.