People died and there was a massive disease
i think
The Civil Rights Act of 1866 needed to be passed to protect the rights of African Americans.
Hope this helps!
Historians view on what caused the war has been ever changing. Directly after the war the popular belief was that Germany had forced the war on the allies, warranting the tough conditions of the treaty of Versailles. During the 1930s a more sympathetic outlook was taken by historians towards the Germans