Iraq or Japan
Hoped this helped if it didn't I'm sorry :) :(
Answer:
The Battle of New Orleans
Explanation:
The Battle of New Orleans, one of the Greatest Victories for the Americans in the War of 1812 (If not the greatest) occurred on January 8th, 1815. And it actually happened after the Peace Treaty, the Treaty of Ghent was already signed by the Americans and Britain. But word never got to either sides in time.
Answer: The answer would be the second one
Hope this helps!
1. The empires are gone 2. The wars over religion and territory have stopped 3. Population has skyrocketed