How to use "wars" in a sentence

It has met every stress of vast expansion of territory, of foreign wars, of bitter internal strife, of world relations

Sala and Cham live in an enormous overcrowded city that they are forbidden to leave, for their own protection: the world outside the city was contaminated during the wars.

They cannot travel, but there will be no more wars

And the wars started."

I wanted to start at once, but the soldier had been in wars before and knew better than that

None of the wars of history had such an effect - six million people, moving without weapons or food or any real sense of direction