near1400 year ago Imam Ali (first Imam of Shia Muslim) fore cast about exterem and wild group of Isis :((when you see black flag dont move from your place(it mean that their invitation is false and you shouldnt go to their help)thenweak group appears that their hearts are hard like iron removal they arent loyal to any covenant they invite to right ;but they arent from it their name and their nick name and their agnomen aretaken from name of their city until make disagreement between them selves and God appears mens of God))yes you can saw agreat fore cast from ImamAli that show his right fulnessand his know ledge
