The Rough Riders is a classic Teddy Roosevelt autobiography about the author's service in the Spanish-American war. The Rough Riders was a nickname given to the 1st United States Volunteer Cavalry, one of three such regiments raised in 1898 for the Spanish-American War and the only one to see action. The United States Army was small, understaffed, and disorganized in comparison to its status during the American Civil War roughly thirty years prior. Following the sinking of the U.S.S Maine President William McKinley needed to muster a strong ground force military group swiftly, which was done so by calling upon 125,000 volunteers to assist in the war efforts. The U.S. was fighting against Spain over Spain's colonial policies with Cuba. The regiment was also called "Wood's Weary Walkers" in honor of its first commander, Colonel Leonard Wood. This nickname served to acknowledge that despite being a cavalry unit they ended up fighting on foot as infantry. Wood's second in command was former Assistant Secretary of the Navy, Theodore Roosevelt, a man who was a strong advocate in support of the Cuban War of Independence. When Colonel Wood became commander of the 2nd Cavalry Brigade, the Rough Riders then became "Roosevelt's Rough Riders." That term was familiar in 1898, from Buffalo Bill who called his famous western show "Buffalo Bill's Wild West and Congress of Rough Riders of the World."