Why did the US want American Samoa?

Before the Spanish-American War (1898) and the acquisition of the Philippines, the US sought to establish island bases to support naval fleets in the Western Pacific. As a result of a conflict with Germany over the islands in the group, the US became interested in Samoa. Once the Philippines were won from Spain, the US also obtained control of the southeastern Samoan islands through the Tripartite Convention of 1899. American Samoa continues to be a territory of the US today.