Khan Academy
Khan Academy: Us History: 1865 1898: Indian Wars/ Battle of the Little Big Horn
In the late nineteenth century, the US Army clashed with Native Americans, and General Custer took his last stand.
Curated OER
National Park Service: Archeology at the Battle of the Little Bighorn
This site from the Midwest Archaeological Center provides general information on the Battle of the Little Bighorn, with additional information derived from modern excavations at the battle site.
PBS
Pbs the West: The Battle of the Little Bighorn
This site from PBS is an excerpt from an 1893 book "Picture Writing of the American Indians" by Garrick Mallery which offers an eyewitness account of the Battle of Little Bighorn by the Lakota Chief Red Horse.
Ibis Communications
Eye Witness to History: The Battle of the Little Bighorn, 1876
This article provides detailed information on the Battle of the Little Bighorn, including a first-hand account from George Herendon, a scout for the Seventh Cavalry.