In the case of Hawaii their queen did not want to be part of America but America worried about deposed her… pointing out only American friends in the government of the archipielago:

When William McKinley won the presidential election in November of 1896, the question of Hawaii’s annexation to the U.S. was again opened. The previous president, Grover Cleveland, was a friend of Queen Liliʻuokalani. He had remained opposed to annexation until the end of his term, but McKinley was open to persuasion by U.S. expansionists and by annexationists from Hawaii. He agreed to meet with a committee of annexationists from Hawaii, Lorrin Thurston, Francis Hatch and William Kinney. After negotiations, in June of 1897, McKinley agreed to a treaty of annexation with these representatives of the Republic of Hawaii.[14] The president then submitted the treaty to the U.S. Senate for approval.

Despite some opposition in the islands, the Newlands Resolution was passed by the House June 15, 1898, by a vote of 209 to 91, and by the Senate on July 6, 1898, by a vote of 42 to 21, annexing Hawaii as a U.S. territory. Its legality continues to be questioned because it was a United States Government resolution, not a treaty of cession or conquest as is required by international law. Both houses of the American Congress carried the measure with two-thirds majorities.

U.S. statehood

All representative districts voted at least 93% in favor of Admission acts. Ballot (inset) and referendum results for the Admission Act of 1959.

In March 1959, both houses of Congress passed the Admission Act and U.S. President Dwight Eisenhower signed it into law. (The act excluded Palmyra Atoll, part of the Kingdom and Territory of Hawaii, from the new state.) On June 27 of that year, a plebiscite was held asking residents of Hawaii to vote on accepting the statehood bill. Hawaii voted at a ratio of 17 to 1 to accept. There has been criticism, however, of the Statehood plebiscite, because the only choices were to accept the Act or to remain a territory, without addressing the issues of legality surrounding the overthrow[15][16][17]. Despite the criticism, the United Nations decolonization committee later removed Hawaii from the United Nations list of Non-Self-Governing Territories.

After statehood, Hawaii quickly became a modern state with a construction boom and rapidly growing economy. The Hawaii Republican Party, which was strongly supported by the plantation owners, was voted out of office. In its place, the Democratic Party of Hawaii dominated state politics for forty years.

In recent decades, the state government has implemented programs to promote Hawaiian culture. The Hawaii State Constitutional Convention of 1978 incorporated as state constitutional law specific programs such as the creation of the Office of Hawaiian Affairs to promote the indigenous Hawaiian language and culture.

In 1900, Hawaii was granted self-governance and retained Iolani Palace as the territorial capitol building. Though several attempts were made to achieve statehood, Hawaii remained a territory for sixty years. Plantation owners, such as the Big Five, found territorial status convenient, enabling them to continue importing cheap foreign labor; such immigration was prohibited in various states of the U.S.

The power of the plantation owners was finally broken by activist descendants of original immigrant laborers. Because they were born in a U.S. territory, they were legal U.S. citizens. Expecting to gain full voting rights, they actively campaigned for statehood for the Hawaiian Islands.

It is more or less the same thing with Spanish colonization