I love Moroni's strategy. With God on his side, he seems almost unstoppable.
So Ammoron decides to be a jerk about the letter-sending, and what-not, so Moroni's like, "Dude... You did NOT just say that! A'ight, then, we'll see who gets to keep prisoners around here!!"
Let's see what could have gone wrong with this strategy....
- An enemy on the inside could have been woken up during the exchange of weapons, and killed all the prisoners and kept the Nephites from gaining control of the city.
- The Lamanites could have not taken of the wine given them, suspected something, and taken Laman (the good Lamanite) and his posse all prisoners, or could have killed them.
- The prisoners could have been moved, and Laman and his posse could have been taken prisoner..
I dunno.. Maybe I'm stretching it. My point is - Moroni took a pretty big risk doing what he did, but it worked - and he ended up not only freeing his own people from prison, but also gaining that many more prisoners without killing or hurting anyone! He also re-took another city in the process!
I guess, when you've got the Lord on your side, it's a good idea to follow the Spirit (which I'm sure Moroni did), and take the risk.