Chief (?) American Horse was also known as (?) Long Elk.
4 Chief (?) American Horse was also known as (?) Iron Shield. Chief (?) American Horse was also known as (?) Wasicu Tasunke.
2 The nationality of Chief (?) American Horse was (an unknown value). Chief (?) American Horse was also known as (?) American Horse.
2,3,4 
He was born in 1839; "Named "Manishee" at his birth in 1840, he later adopted the name of a famous uncle who was killed in battle. He also went by the name Long Elk [Nebraska India Wars Reader, pg. 215]. Fought at the battle of the Little Big Horn along with his brother in 1876. Great warrior, orator and diplomat and member of the Bear people band. American Horse represented his people in Washington D.C. many times. In 1891 he led a successful delegation to Washington which resulted in better administration of Indian affairs and a more nearly adequate living rations. During the reservation era, he was known as a "progressive," in that he sided with reservation agents. In his later years he toured with Buffalo Bill. He rode in the 1905 inaugural parade at the request of President Theodore Roosevelt.
2,4 "

American Horse. By Edward S. Curtis.
He was the son of
Chief (?) Sitting Bear. Chief (?) American Horse married
(?) Sleep after 1862.
2 
Chief (?) American Horse witnessed the meeting of
Chief (?) Dull Knife; The Treaty of Fort Laramie was an agreement between the United States and the Lakota nation, signed in 1868 at Fort Laramie in the Wyoming Territory, guaranteeing to the Lakota ownership of the Black Hills, and further land and hunting rights in South Dakota, Wyoming, and Montana. The Powder River Country was to be henceforth closed to all whites. The treaty ended Red Cloud's War. The treaty included articles intended to "insure the civilisation" of the Lakota; financial incentives for them to farm land and become competitive - and stipulations that minors should be provided with an "English education" at a "mission building". To this end the US government included in the treaty that white teachers, blacksmiths and a farmer, a miller, a carpenter, an engineer and a government agent should take up residence within the reservation. Repeated violations of the otherwise exclusive rights to the land by gold prospectors led to the Black Hills War.
Fort Laramie Treaty, 1868 (Full-Text)
http://www.pbs.org/weta/thewest/resources/archives/four/ftlaram.htm.
5,6,7
Chief (?) American Horse witnessed the meeting of
Chief (?) Red Cloud; "The agency Indians met Daniels, Col. Smith, and Brig Gen. E. O. C. Ord, who had replaced Augur as the commander of the Department of the Platte, on April 10 [1871] to thrash out the well-worn agency problems.70"
[Price,Chiefs, headmen, and warriors :, 1993, pg.93]
"70 Present at the agency during the month of April were the following chiefs and soldiers as designated by Agent Daniels. Oglala Chiefs : Old Man Afraid of His Horse, Blue Horse, Little Wound, and Red Cloud; Oglala Soldiers: Red Shirt, Sword, Sittling Bull the Oglala, Rocky Bear, Three Bears, Sitting Bear (a chief?), American Horse; Brule Chiefs: Stabber (probably Oglala), Day, and White Tail ; Brule Soldiers ; Yellow Robe, White Crane Walking (also identified as Oglala), Tall Lance, and White Bull ; Hunkpapa Chief: Red Dog (probably no the Oglala chief, or if so, improperly identified); Hunkpapa Soldiers: Charging Hawk, Good Thunder, Black Elk, Long Whirlwind, Big Road (Oglala). Also present were several bands of Northern Cheyennes and Arapahoes".
[Price, Chiefs, headmen, and warriors :, 1993, pg.112-11, n70] "43 Present at the June 12 [1871] council were: Red Cloud, Red Dog, Sword, Long Wolf, Man Afraid of His Horse (probably the elder), Quick Bear, Cold Face, Brave Bear, High Wolf, Sitting Bear, Red Plume, Little Cloud, Spider, Fire Thunder, Big Crow, Pretty Crow, Big Foot, Little Wound, Pumpkin Seed, Yellow Bear, Rocky Bear, Bad Wound, Bear Robe, Quick Eagle, Two Buffaloes, Corn Man, White Eyes, Milk, Spotted Horse, Red Leaf, Buffalo Sheds His Hair, and Red Buffalo."
[Price, Chiefs, headmen, and warriors :, 1993, pg.110, n43]
"The agency Indians met Daniels, Col. Smith, and Brig Gen. E. O. C. Ord, who had replaced Augur as the commander of the Department of the Platte, on April 10 [1871]to thrash out the well-worn agency problems.70"
[Price,Chiefs, headmen, and warriors :, 1993, pg.93].8 
U.S. allotting surveyor and his interpreter making an American citizen of Chief American Horse, Oglala Sioux.
He married
Josie (?) after 1882.
2 
American Horse, Warrior Chief of the Sioux Nation, Buffalo Bill's Wild West. (1886). Western History/Genealogy Department, Denver Public Library.

Interior of the frame dwelling built for Chief American Horse on the Pine Ridge Agency, South Dakota. by C.G. Morledge. Western History/Genealogy Department, Denver Public Library.

American Horse / L. W. Stilwell, Deadwood, South Dakota. Western History/Genealogy Department, Denver Public Library
(?) was listed as Head of the Household on the Indian Census at Pine Ridge Indian Reservation, Medicine Root District, Shannon Co., South Dakota, USA, on June 30, 1904.
2
"Home of Mrs. American Horse." Forms part of the John C. H. Grabill Collection.
He died on December 16, 1908 at Pine Ridge Indian Reservation, Pine Ridge, Shannon Co., South Dakota, USA.
3