Hazrat Ali R.A was the first one amongst youth to embrace Islam. He was famous for his bravery and wisdom.  Hazrat Ali R.A remained caliph between 656 and 661 CE, one of the hardest periods in Muslim history, coinciding with the first Muslim civil war. He reigned over the Rashidun empire which extended from Central Asia in the east to North Africa in the west. He became known as a both just and fair ruler

Fourth Caliph of Muslims