Exploring Expedition (1838–42) under Charles Wilkes reached Samoa in 1839 and appointed an Englishman, John C. Williams, son of the missionary, as acting U.S. consul. However this appointment was never confirmed by the U.S. State Department; John C. Williams was merely recognized as "Commercial Agent of the United States". A British consul was already residing at Apia. In 1855 J.C. Godeffroy & Sohn expanded its trading business into the Samoan Islands, which were then known as the Navigator Islands. During the second half of the 19th century German influence in Samoa expanded with large plantation operations being introduced for coconut, cacao and hevea rubber cultivation, especially on the island of 'Upolu where German firms monopolized copra and cocoa bean processing. British business enterprises, harbour rights, and consulate office were the basis on which Britain had cause to intervene in Samoa. The United States began operations at the harbor of Pago Pago on Tutuila in 1877 and formed alliances with local native chieftains, most conspicuously on the islands of Tutuila and Manu'a (which were later formally annexed as American Samoa). In the 1880s Great Britain, Germany and the United States all claimed parts of the kingdom of Samoa, and established trade posts. The rivalry between these powers exacerbated tensions between the indigenous factions which were all jockeying for complete political authority. The islands were divided among the three powers in the 1890s, and between the United States and Germany in 1899. The First Samoan Civil War and the Samoan crisis The First Samoan Civil War was fought roughly between 1886 and 1894, primarily between rival Samoan factions, although the rival powers intervened on several occasions with military forces. There followed an eight-year civil war, where each of the three powers supplied arms, training, and in some cases, combat troops to the warring Samoan parties. The Samoan crisis came to a critical juncture in March 1889 when all three Western contenders sent warships into Apia harbour, and a larger-scale war seemed imminent, until a massive storm on 15 March 1889 damaged or destroyed the warships, ending the military conflict. Robert Louis Stevenson arrived in Samoa in 1889 and built a house at Vailima. He quickly became passionately involved in the attendant political machinations. His influence spread to the Samoans, who consulted him for advice, and he soon became involved in local politics. These involved the three great powers battling for control of