To ensure that the smaller states also had a voice in government.
In order to make sure that each state would approve of the Articles, they decided to just leave representation to one vote for each state, therefore there wouldn't be any arguments between the bigger states, and the small states.
Well I see no documents but I can tell you Americans wanted to expand westward they even created a thing called "Manifest Destiny"
Nope i don't think it did! Not sure srry
The nanjing massacre was the reason for increased tension between japan and the U.S.