They had gone out to try to prevent a war.

We cannot prevent war, not in the present state of our world.

Yet there was still a chance to prevent a general war.

You could tell a thousand and they would not prevent war.

We are fighting in Iraq to prevent a civil war.

We learn to make better guns, not to prevent war.

And perhaps, she thought, I can prevent a shooting war.

"I think we should be doing things to prevent wars and allow people to live in peace."

And, in any event, it would have been impossible to prevent war.

The aim of arms control is to prevent nuclear war.