Answer:
The first attempts to conquest the Kingdom of Hawaii were made in the 1850s, when the intention was to colonize them. In 1854, a treaty was negotiated to join the islands to the USA. It was not signed due to the death of the ruler of Hawaii Kamehameha III. His successor decided to sign only a trade treaty in 1865. In 1875, a bilateral trade treaty was signed, providing for duty-free trade (mainly concerning sugar cane), and also containing a clause that no part of Hawaii would be transferred to third countries and Hawaii would be the de facto American protectorate. The treaty was to last seven years, but in 1884 a new one was signed, which was in fact an extension of the previous one, by which Americans began to take positions in the government.
In 1891, when Queen Lili'uokalani ascended the throne, she decided to limit American power and maintain sovereignty. On January 14, 1893, she dissolved the legislation, appointed a new government, and proclaimed a new constitution. On January 17, however, a revolt of white settlers (openly supported by the United States), led to the overthrow of the queen. In 1893, the Provisional Government made a proposal to the United States for annexation. However, in 1894 a republic was established. The new constitution allowed for a future trade and political union with the US. After the Republicans' victory in the US in 1896, the expansionist policy towards Hawaii was resumed, and on June 16, 1897, the annexation treaty was signed.