One year after the naval base was built at Pearl Harbor in 1887 , the U.S. government established a naval station in Pago Pago .
It was acquired by the United States through a treaty in 1877 .
One year after the naval base was built at Pearl Harbor in 1887 , the United States government established a naval station in Pago Pago .
It was acquired by the United States through a treaty in 1877 .