Protectorates include Ras Mohamed National Park, Zaranik Protectorate and Siwa. Despite being under the protectorate, Tonga retained its monarchy without interruption. In 1896 it annexed these areas, declaring them the Sierra Leone Protectorate. In 1939, Italy annexed Albania, a "de facto" protectorate for decades. Following this, the Khedivate became a "de facto" British protectorate under nominal Ottoman sovereignty. The Ashanti invaded the new British protectorate. In 1890 Zanzibar became a protectorate (not a colony) of Britain. In 1925, Italy forced Albania to become a "de facto" protectorate. They reinstalled Ismail's son Tewfik as figurehead of a "de facto" British protectorate. Russia had viewed Poland as a "de facto" protectorate. The Sokoto area was treated as just another emirate within the Nigerian Protectorate. In 1984, Brunei, Britain's last remaining Asian protectorate, gained its independence. Nigeria became a British protectorate in 1901. His grandfather, Jama, was born in the British protectorate of Somaliland. I an ultimatum demanding the acceptance of an Italian military protectorate over Albania.