Spanish–American War
Aftermath in the United States

The U.S. annexed the former Spanish colonies of Puerto Rico, the Philippines and Guam. The notion of the United States as an imperial power, with colonies, was hotly debated domestically with President McKinley and the Pro-Imperialists winning their way over vocal opposition led by Democrat William Jennings Bryan, who had supported the war. The American public largely supported the possession of colonies, but there were many outspoken critics such as Mark Twain, who wrote The War Prayer in protest. Roosevelt returned to the United States a war hero, and he was soon elected governor of New York and then became the vice president. At the age of 42, he became the youngest person to become president after the assassination of President McKinley.

The war served to further repair relations between the American North and South. The war gave both sides a common enemy for the first time since the end of the Civil War in 1865, and many friendships were formed between soldiers of northern and southern states during their tours of duty. This was an important development, since many soldiers in this war were the children of Civil War veterans on both sides.

The African American community strongly supported the rebels in Cuba, supported entry into the war, and gained prestige from their wartime performance in the Army. Spokesmen noted that 33 African American seamen had died in the Maine explosion. The most influential Black leader, Booker T. Washington, argued that his race was ready to fight. War offered them a chance "to render service to our country that no other race can", because, unlike Whites, they were "accustomed" to the "peculiar and dangerous climate" of Cuba. One of the Black units that served in the war was the 9th Cavalry Regiment. In March 1898, Washington promised the Secretary of the Navy that war would be answered by "at least ten thousand loyal, brave, strong black men in the south who crave an opportunity to show their loyalty to our land, and would gladly take this method of showing their gratitude for the lives laid down, and the sacrifices made, that Blacks might have their freedom and rights."
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