According to The Book of Mormon

Book of Mormon

The Book of Mormon is a sacred text of the Latter Day Saint movement that adherents believe contains writings of ancient prophets who lived on the American continent from approximately 2600 BC to AD 421. It was first published in March 1830 by Joseph Smith, Jr...

, the hill Amnihu was located east of the river Sidon

River Sidon

The River Sidon is the only river mentioned by name in the Book of Mormon. It was near the city of Zarahemla. There were several battles fought in and around this river. These include the battle between Captain Moroni and the Lamanite leader Zarahemna. This battle was ostensibly fought near the...

 and across the river from Zarahemla

Zarahemla

Zarahemla is the name of a prominent land, a capital city, and a leader in the Book of Mormon. The Book of Mormon is revered by members of various Latter Day Saint churches as sacred scripture....

 .

A Nephite dissident, Amlici, brought an army to battle the Nephites . This battle may have been intended primarily as a diversion, luring the Nephite army away from the capital city. The Amlicites hastily retreated southward, joined with a Lamanite army, and raced to attack the city of Zarahemla

Zarahemla

Zarahemla is the name of a prominent land, a capital city, and a leader in the Book of Mormon. The Book of Mormon is revered by members of various Latter Day Saint churches as sacred scripture....

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The hill is only mentioned in two verses: .