Sanhedrin 111: Destroying a City of Idolaters
A story of an old man in Egypt who recounted what his ancestors had done to the Israelite ancestors, which leads to a presentation of Moshe's questioning God, who is then presented as a tad frustrated about that attitude - in contrast to the more accepting approach of the patriarchs. Also, a new, and final, mishnah! With the details of a city of idolaters - an "ir ha-nidachat." Including how the holy things of the city should be handled when the rest of it is being destroyed. And also what can be done in that area after the city itself has been destroyed.