For example, during WWII, there was a shortage of lead and manufacturing industries boomed. Foreign wars often affect imports and exports, especially in the food industry. What are some other major examples? Please tell me how the industry was affected, not just what industry was affected. Thank you VERY much!

definalty the weapons industry. Imagine all the money they made. also the factorys producing metal,rubber,. All were VERY important. infact copper during WW2 was not used in pennys but they acually replaced the copper with steel temperarly. during ww2 rubber was needed so you couldnt buy new tires