Which of the following was a major challenge that faced the United States after the Revolution? 1.Each state was much smaller than they were when they were colonies
2.The national government had too much power
3. Many soldiers were not paid during the Revolution and had no money

i think the most likely answer is 3.

BUT i'm not sure here because the size of the original colonies didn't change, the first national government system established in the U.S was too weak, and soldiers were paid monthly or with bounties to the states.

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939