Notes

Morgans were used as cavalry mounts by both sides in the American Civil War. Horses with Morgan roots included Sheridan's Winchester. Stonewall Jackson's "Little Sorrel" has alternately been described as a Morgan[21] or an American Saddlebred, a breed heavily influenced by the Morgan. While Morgan enthusiasts have stated that the horse Comanche, the only survivor of the Custer regiment after the Battle of the Little Big Horn, was either a Morgan or a Mustang/Morgan mix. records of the U.S. Army and other early sources do not support this.

families
four main bloodlines groups within the Morgan breed today, known as the Brunk, Government, Lippitt, and Western Working.The Government Family is the largest, tracing to Morgans bred by the US Morgan Horse Farm between 1905 and 1951.

organizations
In 1909, the Morgan Horse Club was founded, later changing its name to the American Morgan Horse Association. During the 1930s and 1940s, there was controversy within the registry membership as to whether the stud book should be open or closed; this mirrored similar controversies in other US breed registries.