The United States wanted Hawaii to acquire its islands and because it was a port route to China, eastern India, and Asia. Not only did they want the islands, they wanted their naval base. They wanted their naval base for the war so they would have another advantage to help defeat the other country.
What happened between the United States and Hawaii?
On January 17, 1893, the Hawaiian monarchy was overthrown when a group of businessmen and sugar planters forced Queen Liliuokalani to abdicate. The coup led to the dissolution of the Kingdom of Hawaii two years later, its annexation as a United States territory, and its eventual admission as the 50th state in the union.