Are you talking about the French and Indian War, or what war are you asking about?
Yes iron was used extensively by the Sumerians.
For 4, I’d say the best answer to that would be tradition.
There is no law or amendment set in place that designates the Capitol as the place where inaugurations are to be held.
Answer:
Spanish settlement resulted in much suffering and hardship; it turned many Native Americans into slaves and killed millions of them through battle, mistreatment, and disease.