Our Prophet (saas) Foretold The Four Incidents That Would Occur Following The Appearance Of Hazrat Mahdi (as)

The Qaim, one of the lineage of Ali, will disappear like the disappearance of Prophet Joseph and appear like the reapperance of Jesus, the son of Mary. Following his occultation, he will appear after THE APPEARANCE OF THE RED STAR, THE DEVASTATION OF ZAWRA, THE SUBSIDENCE OF BAGHDAD, AND THE RISE OF SUFYAN,...  

(Bihar al Anwar-89, Allamah Muhammed Baqir al-Majlisi, Bihar al-Anwar English Translation, Volume 13 (old print)/Volume 51-52-53 (Late Print)