Pressure grew in the United States for President William McKinley to intervene, and when the U.S.S. Maine mysteriously blew up in Havana Harbor on February 15, 1898 (probably due to an accidental explosure), President McKinley approved this Resolution of Congress: | Pressure grew in the United States for President William McKinley to intervene, and when the U.S.S. Maine mysteriously blew up in Havana Harbor on February 15, 1898 (probably due to an accidental explosure), President McKinley approved this Resolution of Congress: |