Cincinnati (ca. 1860 - 1878) was General Ulysses S. Grant's most famous horse during the American Civil War. He was the son of Lexington, the fastest four-mile thoroughbred in the United States (time 7:19.75 minutes) and of the greatest sires. Cincinnati was also the grandson of the great Boston, who sired Lexington. At an early age, Grant emotionally bonded to horses. A shy, quiet child, he found joy in working with and riding them. Wikipedia
The definitive Wikipedia entry for Cincinnati. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Cincinnati_%28horse%29