Second Samoan Civil War

The Second Samoan Civil War was a conflict that reached a head in 1898 when Germany, the United Kingdom, and the United States were locked in dispute over who should have control over the Samoan island chain, located in the South Pacific Ocean. 
At the war's conclusion in 1899, the United States was granted the eastern section of the islands, the Germans were granted the western section of the islands, and the British were given the northern Solomon Islands of Choiseul, Isabel and the Shortland Islands that had formerly belonged to Germany. The German half is now an independent nation – Samoa. The U.S. half still remains under the control of the U.S. government as the territory of American Samoa.
Allies.
The allies were the Samoan followers of Malietoa Tanumafili I and supporting naval forces from the United States and the United Kingdom who fought against the rebels of Mata'afa Iosefo.
History.
As result of Malietoa Laupepa's death, Mata'afa Iosefo returned from exile and was elected to power by a council of Samoan chiefs. In response, the British Royal Navy and the U.S. Navy landed forces at Apia in support of Laupepa's son Malietoa Tanumafili I against the German-backed Mataafa.
The first battle of the conflict involving the British and Americans was fought at Apia; when the naval forces landed they occupied much of the city, Mataafan forces attacked, so British and U.S. warships in Apia Harbour began bombarding enemy positions around the city. After the conflict, Mataafaite forces retreated to the stronghold of Vailele and thus began several U.S. and British expeditions into the dense jungle to find the chief's men.
At the end of March, a joint expedition of British, U.S., and Samoan forces marched along the coast from Apia towards Vailele. Skirmishes were fought and two villages destroyed as the Samoan rebels retreated. On April 1, the expedition of 26 marines, 88 sailors and 136 Samoans left the coast for an attack on the landward side of Vailele, leaving the protection of naval gunfire support. The cruisers , HMS "Tauranga", and the corvette HMS "Royalist" landed the sailors and marines, "Royalist" was sent ahead of the expedition to bombard the two forts guarding Vailele plantation.
The Second Battle of Vailele on 1 April was a defeat for the expeditionary forces. They retreated back to Apia and reported their casualties to their commanders, who decided to plan for future operations in the area. On April 13, the British frontline was extended just south of Vailele, and that day the Matafaans attacked, but were repulsed. Another expedition later fought again within Vailele. The rebels won again when they withstood a British-led attack on the two forts. The engagements occurred near the battlefield where Samoan rebels had defeated German troops in 1889 during the first civil war on the island. A statue of Ensign Monaghan was erected in Spokane, Washington to commemorate the young officer's bravery. A second battle in Apia took place on 25 April, when a small force of Samoans attacked a patrol of U.S. Marines, but were driven off without inflicting any casualties.
The war eventually resulted, via the Tripartite Convention of 1899, in the partition of the Samoan Islands into American Samoa and German Samoa.