During wars the makers of weapons do very well. They flourish. Business is booming. Anyone else do just swell? Whom and why?

How do wars affect a nation's economy? During WW2 we Americans had rationing. Sugar and butter for instance were rationed luxuries. The country's citizens worked hard to help in the war effort together. However they could. The country's people supported the war effort. Do you support any current American-involved war ? Which one(s) and why?