Chapter 11 is the sort of chapter in the Bible that really makes this sort of thing fun. Whether or not everyone who reads this ends up agreeing with me, I do feel that I have very appropriate responses to every issue brought up by the SAB in this chapter.
The Ammonites, led by Nahash, come up to Jabeshgilead and prepare to do battle against the inhabitants there. The men there send him a message that they don't want to fight, but would rather make peace. Nahash says, "I'll let you live if you show your loyalty to me by gouging out all your right eyes!" Not surprisingly, they hesitate to agree to this, and send for help.
The word reaches Saul that his fellow Israelites are in trouble, and "the Spirit of God came upon Saul". I make no excuse for this, because I think this is one of the times that Saul is acting in the proper manner for a king of Israel, seizing the opportunity to rally together all the people of Israel and unite them in a common cause. His actions indicate to all the people the seriousness of the cause and their king, and the entire nation rallies at Bezek.
Saul sends messengers to Jabeshgilead, telling them that help is on the way by the following afternoon. True to his promise, the next day the army arrives and fights until the Ammonite army is completely destroyed. (That is, not everyone killed, but "so that two of them were not left together.")
Now I realize that this is in the midst of a bloody battle, but I have to give props to Saul for one more thing here that I personally think the SAB should put a "Good things" label on. After the victory, everyone is so excited about the new unity and military/political power of Israel, that they suggest that the people in the last chapter who rejected Saul be rounded up and killed. Saul immediately squashes this idea, which you can guess from the way things have gone in Israel up until this point, would probably have been a successful endeavor, with virtually nobody to be the voice of reason if Saul had not protested. Instead, they go to Gilgal to make sacrifices to God and recommit themselves to the kingdom of Israel.
Maybe you disagree, but I call it a happy ending.