sentences:  He was a warrior and chieftain under the great prophet Onandagus, who was known from the Hill Cumorah [Ontario County, New York], or eastern sea to the Rocky Mountains ...He was killed during the last great struggles of the Lamanites and Nephites".The Book of Mormon identifies the last struggles or battles between the Nephites and the Lamanites as occurring between 375 A.D. and about 385 A.D.