Do you have any answer choices? maybe could be culture or movements
The correct answer is:
It established the Supreme Court as the ultimate authority on the U.S. Constitution.
World War 1 began after the assassination of Archduke Ferdinand, the heir to the Austro-Hungary empire in 1914. Serbia was still under their rule and killed the heir for independence. Serbia formed an alliance with Russia, and Austro Hungary formed an alliance with France and great Britain. Which caused other countries to "pick a side" belguim sided with serbia and germany sided with Austro-Hungary. The war caused Europe to fall in power
hope this helps