The sinking of the USS Maine in Havana Harbor on February 15, 1898, is one of the most significant events in U.S. history that led to the Spanish-American War. On board were 261 officers and enlisted men who perished when an explosion ripped through the ship's hull with a loud roar heard for miles around. The cause of this blast was never determined; however, there are many theories as to what happened, ranging from sabotage by Spain or even Cuban rebels to mechanical failure due to poor maintenance and design flaws.
At first, Americans believed it was an act of aggression by Spain, but after further investigation, they found no evidence supporting their initial suspicions, which led them towards blaming Cuba instead due to its close proximity and ties with revolutionaries at that time period. This conclusion sparked outrage among American citizens, leading them to believe that war against Spain was necessary for justice despite not having concrete proof about what actually caused the explosion on board the USS Maine. In April 1898, Congress declared war against Spain following a public outcry demanding revenge for those lost aboard the USS Maine, thus beginning America's involvement in World War I, which ended up lasting nearly three years until August 12th, 1901, when a treaty between both nations was signed, ending hostilities forevermore.