The Sherman Act also outlawed contracts, conspiracies, and other business practices that restrained trade and created monopolies within industries. For example, the Sherman Act says that competing individuals or businesses can't fix prices, divide markets, or attempt to rig bids
The most important cause of WW2 (as of WW1) was imperialism. ... Japan started the war due to imperialist motives – to conquer China and Oceania for their resources and manpower. Neither the treaty of Versailles nor the failure of the League of Nations are causes for the Second Word war.
The home fronts provided for the allied Armies things such as metal, rubber, rags. Such things helped strengthen civilian morale and support for the war effort.