The roar of the warriors as they cleared the smoke and found that there was nobody there waiting for them was the first sign that the next stage in the battle had started.
The next was the abrupt end to the artillery bombardment, which was promptly replaced by the sound of the Mass Drivers using large explosions to chase the warriors toward the woods.
Their thoughts said that they knew that they were being herded toward the battlefield that Max had chosen, but they didn't care. They would fight in the open, in the woods, or in the tunnels. It was all the same to them as long as they could avenge the insult that they had suffered by allowing the group in to destroy one of their bunkers and then back out again.
They would accept a great number of difficulties in life and even sacrifice their bodies willingly for the cause, but the thought of being mocked by a tiny force of invaders was enough to drive them into a feral rage.