 Although it was initially headquartered in Egypt, it covered only the part of Egypt south of Assuan, where the population was primarily Nubian, and the Anglo-Egyptian Sudan as well as French colonies Chad and Niger.It also included parts of Adamaua and Sokoto on Lake Chad, and the Nile Province of Uganda Protectorate.In 1851 the Emperor Francis Joseph I of Austria (a Catholic monarchy without overseas colonial interests) took the mission under his protection.