How has the culture of war become a large part of our society?

Using examples from either World War I, WWII, the Cold War, the Korean War, or the Vietnam War, explain how war became a cultural product, either by becoming a cultural icon, or a historical image. Incorporate key figures, and/or literary or cinematic representation if possible.|||Countries feel the need to show other countries that they ar more powerfull.|||all these sense less wars is why the world is like today.