On April 17, American Samoa celebrates the Flag Day. On this day in 1900 these Eastern Samoan islands became part of the United States family.
At the turn of the twentieth century, international rivalries in the latter half of the century were settled by the 1899 Tripartite Convention in which Germany and the United States partitioned the Samoan Islands into two parts: the eastern island group became a territory of the United States (the Tutuila Islands in 1900 and officially Manu’a in 1904) and is today known as American Samoa; the western islands, by far the greater landmass, became known as German Samoa after Britain vacated all claims to Samoa and accepted termination of German rights in Tonga and certain areas in the Solomon Islands and West Africa. Forerunners to the Tripartite Convention of 1899 were the Washington Conference of 1887, the Treaty of Berlin of 1889 and the Anglo-German Agreement on Samoa of 1899.
Source: loc.gov | wikipedia.org