The subsequent military movement suggests the hill Amnihu is north of Gideon, or one of the northern hills that forms the valley of Gideon. As the Nephites gain power over the Amlicites, the latter flee. Mormon does not mention which direction, but he does say that after pursuing them “all that day,” the Nephites camped for the night in the valley of Gideon, while the Amlicites continued towards Minon, where they join an invading Lamanite army in the process of slaughtering the people of Minon. The spies who were sent to follow the Amlicites call the people of Minon “our brethren,” and Alma 3:20 calls them “the people of Nephi.” That makes Minon a part of ZARAHEMLA.
Placing Minon along the border of the south wilderness easily explains the Lamanite invasions in Alma 2 and Alma 3, as they would have come up from NEPHI through the south wilderness. With Minon along the border of the south wilderness, the movement of the Amlicite army would have been southward.
The time frame Mormon provides suggests Minon borders Gideon. The Nephites camp in the valley of Gideon at the end of the first day, while the Amlicites continue southward. The spies Alma sends to track the Amlicites return “on the morrow . . . in great haste” to the valley of Gideon, warning the Nephite army that they must return to the city Zarahemla quickly to defend it against the Amlicite/Lamanite army. In the meantime, the Amlicite/Lamanite army proceeds northward, crosses the river Sidon, and meets the Nephite army as it crosses the river from the valley of Gideon a little further north. The quick reaction by the Nephite army prevented the Amlicite/Lamanite army from taking the city Zarahemla.
This slide show emphasizes the main actions and movements.
The Wilderness Hermounts
Hermounts, like Amnihu, is mentioned only in Alma 2. Mormon does not provide enough information in his narrative to determine its location, other than it appears to be part of the wilderness west of ZARAHEMLA, possibly as far north as bordering Bountiful.
Mormon says the battle-fatigued Amlicite/Lamanite army again flees from the Nephites after the battle on the west side of the river Sidon. They flee “towards the wilderness which was west and north, away beyond the borders of the land” (35). If you look at the map, you will see that two totally different conclusions can be drawn as to the direction the Amlicites and Lamanites took as they fled from the Nephites. Northwest of the battle site might put the Amlicite/Lamanite army along the east sea. However, since Mormon orders the directions "west and north," I conclude that he means they fled towards the west wilderness.
If the Amlicite/Lamanite army made it to the west wilderness, they would expect to have an unfettered route all the way to Bountiful, and possibly all the way to the land northward, depending on whether the Nephites had already fortified Bountiful to the west sea. That is because the west wilderness was inhabited by the more idle part of the Lamanites. This experience may be what prompted the Nephites to fortify Bountiful from sea to sea. Such an effort to make it to the land northward is a goal for Lamanites and apostate Nephites throughout the books of Alma and Helaman, and explains why the Amlicite/Lamanite army didn’t just retreat to the south wilderness.
The Amlicite/Lamanite army may not have been aware of the dangerous, wild-beast infested Hermounts, but Mormon does not say they were killed by the beasts. Rather, they died from their wounds and were devoured by the beasts (Alma 2:37).
We can't locate Hermounts, other than to say it is somewhere in the west wilderness, because Mormon does not tell us how long they fled before they reached Hermounts. He has stopped giving timelines and other details about the experience, other than to tell us about their fate in Hermounts and to remark upon the destruction caused by this effort in ZARAHEMLA. Besides the “greatness of their number” who had been slain, “many women and children had been slain with the sword, and also many of their flocks and their herds; and also many of their fields of grain were destroyed, for they were trodden down by the hosts of men” (3:2).