In the book, Things Fall Apart, how was order among the crowd maintained?

From the text:

The young men who kept order on these occasions dashed about, consulting among themselves and with the leaders of the two wrestling teams, who were still outside the circle, behind the crowd. Once in a while two young men carrying palm fronds ran round the circle and kept the crowd back by beating the ground in front of them or, if they were stubborn, their legs and feet.