Only the one done by emperor Nero seemed to be a preparative for the conquest of Ethiopia or Nubia: in 62 AD two legionaries explored the sources of the Nile river.
Wa ijjan Emperor Nero ɣas a eqqalan asilmid s asidu i aramas wan Ethiopia meɣ Nubia: Daɣ awatay wan 62 datat annabi ɣisa ,ilan ti issin imassukal ittarnen tidarfite n akal ɣur ejarew wan Nile