Answer: They got help from other countries like France and Spain.
Explanation: Because of the seven years war countries like France and Spain were still mad at Britain and took the colonists side to see Britain fall. With the help from other countries the colonies pulled through and won. This was not easy, at valley forge was a place of suffering and grit to fight for independence.
America had the responsibilities of bringing their states together since the states were so used to Salutary Neglect. (Chill/ Laid back enforcement of law) The states were off doing their own thing so it was hard to pull together and work like a nation. Some states had their own money currency so it made it harder to get a set in stone currency for the new nation.
I hope this helps! I tried by best on what I know.
