Chapter 4, Mishna 2,3,4
Who is permitted to leave his Shabbos or Festival boundary? What happens when he gets there and fulfills his mission? If he’s a soldier, may he continue to carry his weapons? May we attack the besiegers of a town on Shabbos? What if it’s a border town? Does a traveler acquire a Shabbos dwelling if he’s asleep as Shabbos begins? Does water that fell as rain on a Festival acquire a Festival dwelling? If so, how far can it be carried?