. . . "navy" . . . . . . . "caliphate naval" . . . . . "Early Caliphate navy" . "Rashidun navy" . . . . . . . . . . . . "a navy of their own" . . . . . . . . . . . . . . . . . . . . . "0743" . . . . . . . . "0638" . . "Early Caliphate navy" . "built its own fleet" . . . . . . . "200-1,800 ships" . . . . . . . .