Mormon 1

And now I, Mormon, make a record of the things which I have both seen and heard, and call it The Book of Mormon. And about the time that Ammaron hid up the records unto the Lord, he came unto me, I being about ten years of age — and I began to be learned somewhat after the manner of the learning of my people — and Ammaron said unto me, I perceive that thou art a sober child, and art quick to observe. Therefore, when ye are about twenty and four years old, I would that ye should remember the things that ye have observed concerning this people.

Mormon 2

And now it came to pass that in the three hundred and sixty and third year, the Nephites did go up with their armies to battle against the Lamanites, out of the land of Desolation. And it came to pass that the armies of the Nephites were driven back again to the land of Desolation. And while they were yet weary, a fresh army of the Lamanites did come upon them. And they had a sore battle, insomuch that the Lamanites did take possession of the city Desolation, and did slay many of the Nephites, and did take many prisoners; and the remainder did flee and join the inhabitants of the city Teancum. 

Mormon 3

And now I finish my record concerning the destruction of my people, the Nephites. And it came to pass that we did march forth before the Lamanites. And I, Mormon, wrote an epistle unto the king of the Lamanites, and desired of him that he would grant unto us that we might gather together our people unto the land of Cumorah, by a hill which was called Cumorah, and there we would give them battle. And it came to pass that the king of the Lamanites did grant unto me the thing which I desired. 

Mormon 4

Behold, I, Moroni, do finish the record of my father Mormon. Behold, I have but few things to write, which things I have been commanded of my father. And now it came to pass that after the great and tremendous battle at Cumorah, behold, the Nephites who had escaped into the country southward were hunted by the Lamanites until they were all destroyed, and my father also was killed by them. And I, even I, remain alone to write the sad tale of the destruction of my people.