The annexation of Hawaii was a complex, decades-long process driven by American economic interests, strategic ambition, and the overthrow of a sovereign monarchy. Key phases:
American missionaries arrived in 1820, followed by sugar planters who gained economic dominance. The 1875 Reciprocity Treaty gave Hawaiian sugar duty-free U.S. entry, binding the islands to American markets.
King Kalākaua was forced at gunpoint by the "Honolulu Rifles" (white planter militia) to sign a constitution stripping the monarchy of power, disenfranchising Native Hawaiians and Asian immigrants, and empowering wealthy foreigners.
Queen Liliʻuokalani attempted to promulgate a new constitution restoring native rights. A "Committee of Safety" (13 white businessmen) conspired with U.S. Minister John Stevens to land 162 Marines from USS Boston. The Queen yielded under protest to avoid bloodshed. A provisional government led by Sanford Dole took control.
Spanish-American War made Hawaii strategically vital as a coaling station and naval base. President McKinley signed the joint resolution July 7, 1898; formal transfer August 12, 1898. No treaty (which would require 2/3 Senate vote) was used—controversial constitutionally.
Organic Act established territorial governance: appointed governor, limited suffrage, English-only schools, suppression of Hawaiian language and culture.
Native Hawaiians never consented. The 1993 U.S. Apology Resolution (PL 103-150) acknowledged the overthrow was illegal. Today, sovereignty movements seek restoration, reparations, or federal recognition. Hawaii became the 50th state in 1959.