<span>They US was angry from the surprise attack from the Japanese on Pearl Harbor, so they started preparing for war.</span>
One of the main reasons why southern African Americans became more urbanized during the great migration period is because many of them sought work in cities, due to more job opportunities when compared to the farm-life in the South.
People did not know that the death toll was increasing because they were not told by the news reporters.
I hope this helps •_•