On the afternoon of June 25, 1867, an overwhelming force of Sioux and Cheyenne Indians quickly mounted a savage onslaught against General George Armstrong Custer's battalion, driving the doomed troopers of the U.S. Seventh Cavalry to a small hill overlooking the Little Bighorn River, where Custer and his men bravely erected their heroic last stand.

So goes the myth of the Battle of the Little Bighorn, a myth perpetuated and reinforced for over 100 years. In truth, however, "Custer's Last Stand" was neither the last of the fighting nor a stand.

Using innovative and standard...