When there is enough insurgent death there will be a political solution.
More troops, more insurgent death.
More troops, more insurgent death.
Not if the troops are limited to manning checkpoints, painting schools, patroling the streets like a beat cop, and doing other none war making activities.
If more troops are to be sent, send them with the mission, authority, and orders to conduct military operations that result is the death and destruction of terrorists, their supporters, and the infrastructre that supports them.