Seriously. One of the main reasons we're at war now is due to the weakness of the State Department.
The State Department and the Defense Department are two edges of the same sword. The job of both is to promote American interests. Since the State Department failed in their mission by appeasing the Middle Eastern dictators instead of convincing them to do things our way, we are now forced to used the sharper edge of the sword. That edge is, unfortunately, costlier and bloodier.
War is the only alternative when our own State Departments works against our best interests.