Second Army Corps (Spanish–American War) about one month. The number of deaths and at Thoroughfare Gap was 34. Only two brigades of the 2d Army Corps saw combat in the Spanish–American War. They left for Santiago de Cuba to reinforce Gen. Shafter's army. An armistice having been reached between the U.S. and Spain ending the war’s fighting on August 12, 1898. The Separate Brigade, 3rd Division 2d Army Corps, under command of Brigadier General Henry M. Duffield, left Camp Alger June 15, 1898. They soon saw action in the Battle of the Aguadores, Cuba. After which the brigade was transferred to the Fifth Army Corps
Battle of Santiago de Cuba and later research by historians, have suggested that nearly 85% of the Spanish ammunition at Santiago was utterly useless, either defective or simply filled with sawdust as a cost-saving measure for practice firing. The American ammunition had no such issues of lethality. "Vizcaya" continued the fight until overwhelmed, and by the end of the engagement she had been struck as many as 200 times by the fire from "Brooklyn" and "Texas". "Brooklyn" had closed to within when she finally delivered an round which, according to witnesses, may have detonated a torpedo being prepared for launch. A huge explosion ensued, "Vizcaya"