INDIAN HISTORY

Detailed explanation-1: -The Fourth Fitna or Great Abbasid Civil War resulted from the conflict between the brothers al-Amin and al-Ma’mun over the succession to the throne of the Abbasid Caliphate.

Detailed explanation-2: -Mamun was the most intellectual of the Abbasid caliphs, espousing a rationalist view of Islam. He transformed the caliphal library, which his father had founded in Baghdad into a virtual university.

Detailed explanation-3: -In 832, al-Ma’mun led a large army into Egypt to put down the last great Bashmurite revolt. While there he ordered the breaching of the Great Pyramid of Giza looking for knowledge and treasure. He entered the pyramid by tunneling into the Great Pyramid near where tradition located the original entrance.