During World War I and II, the United States government understood the importance of military mass production for the war effort. The United States government understood the lessons learned from World War I. So, the United States and private industrial companies understood the importance and advantages of building such a positive and progressive partnership. The United States had and still has a well-established industrial complex system. However, the government's main problem in World War II was that it lacked the necessary professional industrial skills to allocate resources for the war effort. Therefore, the United States government established the The government hired industrial and manufacturing professionals to allocate resources and supervise war production in factories during WWII. ​