It looks like there’s finally going to be an all out war against the humans and the apes. In the trailer it shows how the apes tried to negotiate for peace and even showed mercy. But, you can only push someone into a corner so far before it leads to an all out war.
In War for the Planet of the Apes, the third chapter of the critically acclaimed blockbuster franchise, Caesar and his apes are forced into a deadly conflict with an army of humans led by a ruthless Colonel. After the apes suffer unimaginable losses, Caesar wrestles with his darker instincts and begins his own mythic quest to avenge his kind. As the journey finally brings them face to face, Caesar and the Colonel are pitted against each other in an epic battle that will determine the fate of both their species and the future of the planet. -2oth Century Fox