The American economy reached an extraordinary expansion during the First War, impelling its industry immensely as the US became responsible for the supply of raw materials, industrialized products and armaments to Europe.
There was then a moment of economic euphoria in the country and the predominance of the "American way of life". However, the euphoria led to overproduction and there was enough demand, causing recession. This was the initial scene of the Great Depression of the 1930s.
Pretty much everyone except northeast . Because southeast there is Florida which is hot in summer and not that cold. Southwest it gets so hot and not really cold. Mid west does get very warm as well too
Besides being a location of trade, the great lake housed colonial fleets for commodore Mathew Perry and was a place where ships ( war and commercial ) where being made.