Who are the Cadets of Temperance? Why is Tom inspired to join, and what do he and his friends learn from this experience?

This is a group that swears to abstain from smoking, drinking, swearing and other various social vices. Tom's membership is humorous because he is a kid who did these things; they were a part of his personality. With Tom all these behaviours didn't seem so bad because he was such a likable kid. Tom wanted to join mostly because he liked their fancy outfits.

How are Tom and huck affected when muff potter finally speaks to them? What does this ultimately lead to.