When did the US military involvement begin in Hawaii?

The US military involvement in Hawaii began in the 19th century. In 1872, the US and the Kingdom of Hawaii signed a treaty that allowed the US to establish a naval base at Pearl Harbor. In 1893, the US annexed Hawaii, and it became a US territory. In 1898, Hawaii was officially annexed by the US and became the 50th state in 1959. Since then, the US military has maintained a strong presence in Hawaii, with several military installations and bases, including Pearl Harbor, Hickam Air Force Base, and Schofield Barracks.