North Solomon Islands between Bougainville (an autonomous region of Papua New Guinea) and the sovereign state of Solomon Islands, which is the successor state to the British Solomon Islands Protectorate renamed in 1975 prior to achieving independence in 1976. On 17 February 1568, the archipelago was discovered by Spanish explorer Alvaro de Mendaña y Neyra, who named its "Islas de Salomon". In April 1885 a German protectorate ("Schutzgebiet") was declared over the northern Solomon Islands: Bougainville, Buka, Choiseul, Santa Isabel and Ontong Java. In 1893 the British declared a protectorate over the southern Solomon Islands of New Georgia, Guadalcanal, Malaita and San Cristobal,
Guadalcanal Campaign naval attack and troop landing and ordered the supply ships at Guadalcanal to depart by early evening 12 November. Callaghan's force comprised two heavy cruisers, three light cruisers, and eight destroyers. Around 01:30 on 13 November, Callaghan's force intercepted Abe's bombardment group between Guadalcanal and Savo Island. In addition to the two battleships, Abe's force included one light cruiser and 11 destroyers. In the pitch darkness, the two warship forces intermingled before opening fire at unusually close quarters. In the resulting mêlée, Abe's warships sank or severely damaged all but one cruiser and one destroyer in Callaghan's force and both