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During the caliphate of Ali, Husayn accompanied him in wars. After the assassination of Ali, he obeyed his brother in recognizing the Hasan–Muawiya treaty, despite it being suggested to do otherwise. In the nine-year period between Hasan’s abdication in AH 41 (660 CE) and his death in AH 49 (669 CE), Hasan and Husayn retreated to Medina, trying to keep aloof from political involvement for or against Mu’awiya. After the death of Hasan, when Iraqis turned to Husayn, concerning an uprising, Husayn instructed them to wait as long as Mu’awiya was alive due to Hasan’s peace treaty with him.
