"20pxByzantine Empire" . "besieged the fortress of Babylon" . . . . . . . "Unknown" . "Siege of Babylon fortress" . "falling in December 640" . . . . "Siege of Babylon fortress in Egypt" . . . . "Siege of the Babylon Fortress" . . "siege of Babylon fortress" . . . "Rashidun Caliphate" . . "Byzantine Empire" . "Siege of Babylon Fortress" . . "Muslim victory" . "besieged Babylon" . . . "Babylon Fortress, Siege of" . "fall of Babylon" . "12,000" . . "Unknown" . . "Siege of Babylon Fortress" .