The US joined in: December 7, 1941.
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.
Migration:-
Migration is to leave the country you live in, your own country and go live in another country you chose forever.
Caesar Augustus is a Roman statesman and military leader who became the first emperor of the Roman Empire.
