Answer:
The Tenth Amendment helps to define the concept of federalism
Explanation:
The relationship between Federal and state governments is outlined by the 10th amendment. As Federal activity increases, the problem of reconciling state and national interests grow as they apply to: the Federal powers to tax, to police, and to regulations such as wage and hour laws, disclosure of personal information in recordkeeping systems, etc.
They called themselves Federalists
I think it was the Jones Act but i'll comment on this answer if i'm wrong
Gradual end. There was still fighting even after US withdrawal. The war did ultimately end.