Is it fair/justifiable to destroy cities/civilizations during a time of war?

I do not think that it is fair or justifiable to destroy cities and civilizations during a time of war. I think that cities get bombed, and are ruined it is affecting the innocent people that had no part of the war to begin with. Countries need to figure out new ways of solving problems instead of ruining cities and civilizations. It is not fair because most of the country's citizens probably do not want to go into war to begin with, so putting them in a state of shock, and ruining their cities and everything with bombs is just not fair whatsoever. It is not fair to ruin the lives of people who didn't want to go to war to begin with.