American Samoa's Flag History
The flag is blue with a white triangle, edged in red, based on the fly. The triangle extends to the hoist and bears the American eagle in proper colors and facing towards the hoist. It grasps the symbol of power of the Samoan chiefs, the "uatogi" (war-club) and the symbol of wisdom of the councils, the "fue" (ritual stick). The colors of the flag are both Samoan and American, and the American eagle, holding traditional Samoan emblems, represents the protection and friendship of the United States.
Link here to the American Samoa Historical Society for facts, figures and history of American Samoa.