The struggle began over the annexation of Hawaii. After numerous attempts to annex Hawaii to the United States a revolution was finally consummated in Honolulu in 1893. At that time, under treaty provisions, the neutrality of Hawaii was guaranteed by the United States. Likewise, "of the capital invested in the islands, two-thirds is owned by Americans." This statement is made in "Address by the Hawaiian Branches of the Sons of the American Revolution, the Sons of Veterans, and the Grand Army of the Republic to their compatriots in America Concerning the Annexation of Hawaii." (1897.) These advocates of annexation state in the same address that: "The revolution (of 1893) was not the work of filibusterers and adventurers, but of the most conservative and law-abiding citizens, of the principal tax-payers, the leaders of industrial enterprises, etc." The purpose behind the revolution seemed clear. Certain business men who had sugar and other products to sell in the United States, believed that they would gain, financially, by annexation. They engineered the revolution of 1893 and they were actively engaged in the agitation for annexation that lasted until the treaty of annexation was confirmed by the United States in 1898. The matter was debated at length on the floor of the United States Senate, and an investigation revealed the essential facts of the case. The immediate cause of the revolution in 1893 was friction over the Hawaiian Constitution. After some agitation, a "Committee of Safety" was organized for the protection of life and property on the islands. Certain members of the Hawaiian government were in favor of declaring martial law, and dealing summarily with the conspirators. The Queen seems to have hesitated at such a course because of the probable complications with the government of the United States. The _U. S. S. Boston_, sent at the request of United States Minister Stevens to protect American life and property in the Islands, was lying in the harbor of Honolulu. After some negotiations between the "Committee of Safety" and Minister Stevens, the latter requested the Commander of the _Boston_ to land a number of marines. This was done on the afternoon of January 16, 1893. Immediately the Governor of the Island of Oahu and the Minister of Foreign Affairs addressed official communications to the United States Minister, protesting against the landing of troops "without permission from the proper authorities." Minister Stevens replied, assuming full responsibility.