In April 1898, tensions between the United States and Spain escalated dramatically, leading to a declaration of war that would change the course of history for both nations. On April 24, Spain formally declared war against the United States, a move born from escalating conflicts surrounding Spain’s colonial rule over Cuba. The Cuban War of Independence had been underway since 1895, and American public opinion, fueled by sensational journalism and the humanitarian crisis in Cuba, strongly favored intervention. In response to Spain's declaration, the United States quickly mobilized its military forces. Just two days later, on April 26, President William McKinley, under considerable pressure from the American populace and Congress, declared war against Spain. This rapid sequence of events marked the beginning of the Spanish-American War, a conflict that stood as a pivotal moment in American foreign policy and imperialism. The war revealed the strengths and weaknesses of both nations. The United States, with its burgeoning industrial might, aimed to assert itself on the global stage, while Spain's decades-old colonial empire grappled with waning influence. Fighting commenced in the Caribbean, notably with the U.S. Navy’s swift victory at the Battle of Manila Bay and the iconic land engagement in Santiago de Cuba. Public sentiment in the United States was overwhelmingly supportive of the war, driven by a prevailing spirit of nationalism and the rallying cry for “Cuban freedom.” The conflict ultimately resulted in a decisive victory for the United States, leading to the Treaty of Paris in December 1898, which ceded territories including Puerto Rico, Guam, and the Philippines, thereby marking the emergence of the U.S. as a global power and ushering in a new era of American imperialism.