Even though both letters are filled with threats, the actual purpose of the letters is accomplished rather easily. For Ammoron, the issue really is that he needs to “preserve my food for my men of war.” He is far from his homeland and the supply lines are long. While he has captured cities, he has less access to the fields where the food is growing. Thus, feeding people who he doesn’t care about removes food from those he needs in order to continue the war.
Both men get just what they wanted, although they had to posture anyway.
There is no chapter break at this point in the 1830 edition.