Mamun Defeats Amin at The Battle of Rayy ... 1451en.wikipedia.org 01/05/811 History The Battle of Rayy was fought on May 1, 811 CE as part of an Abbasid civil war (the "Fourth Fitna") between the two half-brothers, al-Amin and al-Ma'm...View Details»

Mamun Wins Battle Of Rhagae... 44061host2u.com 01/05/811 History The Battle of Rhagae was fought on May, 1, 811 between the two sons of Harunolrashid, Al-Amin and Al-Mamun. In 802 Harunolrashid,, ordered that Amin ...View Details»

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