When the group began to move, they started slowly in order to make sure that the enemies around wouldn't notice their approach and in order to confirm that they didn't have scouts hidden behind the hills. While they might not have that, Sigma assumed that their leaders must be on the back and watching things from a distance…
Fortunately, their worries were unnecessary since they crossed one full kilometer with no problems on their path, and around that area, the hills began to disappear, so they began to hurry up the horses.