Analysis of information sources in references of the Wikipedia article "Τζαουχάρ αρ-Ρουμί" in Greek language version.
The architect of his military system was a general named Jawhar, an islamicized Greek slave who had led the conquest of North Africa and then of Egypt
After the accession of the fourth Fatimid caliph, al-Mu'izz (953- 975), a cultivated and energetic ruler who found an able second in Jawhar, an ethnic Greek, conditions for conquest of Egypt improved.
