Formed in 1898, this league opposed the annexation of the Philippines captured as a prize in the Spanish American war. It was compromised of many powerful people including Grover Cleveland mark twain and Andrew Carnegie.
The anti-imperialists were led by senator henry m. teller, who included in the war bill a promise that the United States would not annex Cuba following the war. Anti-imperialists did not, however. Prevent the establishment of an American military government on the island, nor did they manage to protect in advance the independence of other territories claimed during the war.
In this era we saw emergence of yellow journalism, which exaggerated the facts and actually helped to start the Spanish-American war. This type of news reporting originated from newspaper tycoons such as William Randolph Hearst and Joseph Pulitzer; instead of reporting the truth they decided to exaggerate the action to try to out sell each other. This new-found journalism drowned out most of the opposition.
About Cubans although at first the Cubans rejoiced American coming to their aid, it turned out to be a bitter victory for them.
The majority of the Spain population opposed going to war with the United States in 1898, so it was with reluctance that Spain went to fight, feeling that they had the right to defend their territories against American interests.
The resistance groups during the Spanish American war were not well organized. Not long after these resistance groups formed, the resistance groups started collapsing, causing the end of the war.