Why is the battle of Karbala (October 10. 680 CE) considered the beginning of the crystallization of Shi'I religious identity

Why is the battle of Karbala (October 10. 680 CE) considered the beginning of the crystallization of Shi'I religious identity Order Description paper should consist of five-page typewritten, double-spaced, with normal margins and fonts. The paper is not a book review, nor is it be a review of the established literature, rather it should be written in an analytical manner. Students must cite their sources using Chicago Style and class notes are not to be used as credible citation references. The final paper consists of a five-page typewritten, double-spaced, with normal margins and fonts analytical essay. The student to write the paper in an analytical manner, emphasizing the historical context. Outside research may be necessary to write a historically relevant analytical essay. The paper is not a research paper; rather it is an analytical essay in which the student’s views come to the fore.