The Great Okie Migration (Justin and Marküs)
At the beginning of the 1930's, many states like Oklahoma, Arkansas, Texas and Colorado were affected by the Dust Bowl (a storm of dust and sand). It causes a drought, because of it the soil was very dry and the plantations died.
The farmers couldn't stay in this situation because they earned no money so they chose to leave their farms and went to a place where they were supposed to live in a better way.