Does the Hadith that mentions the conquest of Europe and Rome with "Allahu Akbar" (God is the Greatest) and "La Ilaha Illa Allah" (There is no god but Allah), and Satan's cry announcing the appearance of the Dajjal (Antichrist), and the Mahdi sending ten horsemen to investigate the matter, indicate the reality of the Mahdi's emergence at the end of time, and is the Mahdi aware of this Hadith or not, and can he read and write?

The story of the Mahdi is mentioned in authentic hadiths and has reached the level of tawatur ma'nawi (connotative widespread transmission). Belief in his advent is obligatory. He is a man from this nation who will emerge at the end of time, rule by Islam, and spread justice. He is neither a prophet nor does he receive revelation. Your objection regarding his unawareness that the devil's cry is false is unsound, given the established reports about the Mahdi from the Prophet, peace and blessings be upon him, and that what Allah has decreed will come to pass. It is possible that the Mahdi and those with him were not aware of those hadiths or had forgotten them.