Traps
As the night was about to fall, black plumes of smoke appeared on the hill visible from the orc camps, not from just one but three different hills.
Noticing the black smoke, within the middle of the camp, one of the orcs growled calling out the other of its kind and with it, all the other orcs including the riders immediately gathered with their weapons and armor ready. The orc seemed to act as the leader, yet apart from its size, it looked just like any other orc. The leader growled and made gestures, a cue for the other orcs to start their formation.
500 more orcs and uruks combines started to divide into 10 war parties. Quickly after two war parties totaled of 100 would gather and each would go check the smokes leaving 4 parties to stay in the camp.
The three groups shouted and ran out of the camp, heading towards the smoke like moths to a flame.