Brother against brother - Ether 7:6-9

6 Now the land of Moron, where the king dwelt, was near the land which is called Desolation by the Nephites.
7 And it came to pass that Kib dwelt in captivity, and his people under Corihor his son, until he became exceedingly old; nevertheless Kib begat Shule in his old age, while he was yet in captivity.
8 And it came to pass that Shule was angry with his brother; and Shule waxed strong, and became mighty as to the strength of a man; and he was also mighty in judgment.
9 Wherefore, he came to the hill Ephraim, and he did molten out of the hill, and made swords out of steel for those whom he had drawn away with him; and after he had armed them with swords he returned to the city Nehor and gave battle unto his brother Corihor, by which means he obtained the kingdom and restored it unto his father Kib.

(Book of Mormon | Ether 7:6 - 9)

Kib does battle with his brother and restores the kingdom to his father. The brother of Jared warned that the anointing of kings would lead the people into captivity. He was proven prophetic. Just a few generation have passed and already the people have forgotten the Lord that delivered them safely to the promised land.
Of interest in this passage is the mention of “steel” in verse 9. Many distracters to the Book of Mormon cite references like this to say the Book of Mormon must be false because steel didn’t exist at that time.

Jeff Lindsay has put together a LDS FAQs page that addresses this issue.