Hillforts now had wooden palisades on top of their banks to protect the enclosed farmsteads and villages from stock wandering off or being taken by rustlers, and from attacks by wild animals or other people. Later a rampart was added from which sentries could patrol. These were supported by timber and/or stone structures. Timbers were probably transported by carts or dragged by oxen. At the entrances were several openings only one of which really allowed entry. The others went between banks into dead ends and served as traps in which to kill the enemy from above. Gates were of wood, some hung from hinges on posts which could be locked. Later guard chambers were added, some with space for hearths and beds. Sometimes further concentric circles of banks and ditches, and perhaps a second rampart, were added around these forts. They could reach to 14 acres. The ramparts are sufficiently widely spaced to make sling-shotting out from them highly effective, but to minimize the dangers from sling-shotting from without. The additional banks and ditches could be used to create cattle corridors or to protect against spear-thrown firebrands. However, few forts had springs of water within them, indicating that attacks on them were probably expected to be short. Attacks usually began with warriors bristling with weapons and blowing war trumpets shouting insults to the foe, while their kings dashed about in chariots. Sometimes champions from each side fought in single combat. They took the heads of those they killed to hang from their belts or place on wood spikes at the gates. Prisoners, including women and children, might become slaves. Kings sometimes lived in separate palisades where they kept their horses and chariots.