>The point is that the United States, for the first time in her history,
>premvtively attacked another sovereign nation - and without justifiable
>cause.

Not so fast.

Nicaragua:
http://en.wikipedia.org/wiki/History_of_Nicaragua
American pressure against the government escalated, including attacks on Nicaraguan ports and oil installations (September 1983-March 1984) and the laying of magnetic mines outside Nicaraguan harbours (early 1984), actions condemned as illegal (June 27, 1986 Nicaragua v. United States) by the International Court of Justice.

Guatemala:
http://en.wikipedia.org/wiki/Operation_PBSUCCESS
CIA-organized covert operation that overthrew the democratically-elected President of Guatemala, Jacobo Arbenz Guzmán

Cuba:
http://en.wikipedia.org/wiki/Bay_of_Pigs_Invasion
The Bay of Pigs Invasion (also known in Cuba as La Playa Girón after a beach in the Bay of Pigs where the landing took place) was a United States planned and funded landing by armed Cuban exiles on southern Cuba in an attempt to overthrow the Cuban socialist government of Fidel Castro in 1961.

Phillipines:
http://en.wikipedia.org/wiki/Philippine-American_War
In December 1898, the U.S. purchased the Philippines and other territories from Spain at the Treaty of Paris for the sum of 20 million United States dollars, after the U.S. defeated Spain in the Spanish-American War. The U.S. government made plans to make the Philippines an American colony. However, the Filipinos, fighting for their independence from Spain since 1896, had already declared their independence on June 12. On August 14, 11,000 ground troops were sent to occupy the Philippines.