Answer:
Spain :)
Explanation:
The invasion of the North American continent and its peoples began with the Spanish in 1565 at St. Augustine, Florida, then British in 1587 when the Plymouth Company established a settlement that they dubbed Roanoke in present-day Virginia.
The answer to your question is: The War Industries Board's main power given to them after its creation in 1917 was to encourage the companies to do mass-production methods. This is to increase efficiency and encouraged them by producing standard products without having any waste.
This is called the humanistic personality theory.
