The Spanish American War
President McKinley asked for a declaration of war on April 20, 1898 by the Congress of the United States against Spain. The reluctant request by the President came in the face of United States newspaper attacks on the Spanish government for treatment of the Cuban people as well as the explosion of the USS Maine in Havana harbor the previous February which resulted in many American deaths.
The Spanish–American War was a conflict in 1898 between Spain and the United States, effectively the result of American intervention in the ongoing Cuban War of Independence. American attacks on Spain's Pacific possessions led to involvement in the Philippine Revolution and ultimately to the Philippine-American War.
Original title: "Colonel Roosevelt and his Rough Riders at the top of the hill which they captured, Battle of San Juan Hill." US Army victors on Kettle Hill about July 3, 1898 after the battle of "San Juan Hill(s)." Left to right is 3rd US Cavalry, 1st Volunteer Cavalry (Col. Theodore Roosevelt center) and 10th US Cavalry. A second similar picture is often shown cropping out all but the 1st Vol Cav and TR.