Adal Sultanate
In 1507 Matthew (or Matheus), an Armenian, had been sent as Ethiopian envoy to Portugal to ask aid against the Adal Sultanate. In 1520 an embassy under landed in Ethiopia (by which time Adal Sultanate had been remobilized under Ahmad ibn Ibrahim al-Ghazi). An account of the Portuguese mission, which remained for several years, was written by the chaplain, Francisco Álvares.