From the beggining of the 20th century to the start of World War II there was a huge rollercoaster happening in the wheat business.
The prices climbed sharply before World War I and peaked after its end. European farm production was able to guarantee years of low prices and the American agriculture was deemed to a great depression even before the stock market crash of 1929. The prices climbed in the mid-1930s and then plunged again. Not until World War II did America sustained increases in price and demand.
The treaty of Versailles was an unfair treaty because they blamed everything on Germany and restricted its capabilities as a country and they had to pay for the war to the other states/counties