I would say the most significant weaknesses of the government under the Articles of Confederation was the fact that the central government was too weak to enforce laws and couldn't impose taxes. The states had the most authority and since the government wasn't able to impose taxes, it doesn't have enough funds for a military (and it had to ask the states for troops). Without a strong military, it will be hard to defend the nation well if anything should occur.
This depends on who you consider to be the author. If the author in your case would be a famous old historian, then they would probably marvel at the architectural accomplishments of ancient Rome and how they were able to create such magnificent structures in such a short amount of time.
The answer for this question is tropical rain forests
He wanted more land for America