Answer :

Gibbs
In July of 1898 Congress passed the Newlands Resolution named after Congressman Frank Newlands which officially annexed Hawaii to the United States. However, it was not until 1959 when Hawaii became a state of the United States of America. 

Answer:

annexation

Explanation:

President William McKinley's administration favored annexation and, in 1898, Congress proclaimed Hawaii an official U.S. territory.