If the citizens were not required, no one may want to. On jury, you may have a case that may take a long time and you may end up sentencing someone to death. It is likely if citizens were not required that no one would want to volunteer.
World War II occurred as a result of several factors, including (but not limited to) Nazi Germany's aggressive military and industrial expansion, as well as Japan's foreign policy in Asia and Italian Facism.
Answer:
it did not get three fourths approval that was needed