The United States gained a virtual right of intervention in Cuba through the Platt Amendment. The Platt Amendment was an amendment to the 1901 Army Appropriations Bill, which was passed by the U.S. Congress and signed into law by President William McKinley on March 2, 1901. The amendment specified seven conditions for the withdrawal of U.S. troops from Cuba, including that Cuba could not make any treaty with a foreign power that would impair its independence, that Cuba would allow the U.S. to intervene in Cuban affairs if necessary to maintain peace and order, and that Cuba would sell or lease land to the U.S. for coaling or naval stations.
The Platt Amendment effectively made Cuba a protectorate of the United States, as it gave the U.S. significant control over Cuban affairs. The U.S. used this control to intervene in Cuban politics and economy, leading to resentment among many Cubans and contributing to anti-American sentiment in the country.