Answer:
Federal troops began entering the state in late May 1865. Their commanders believed that their duty, at least in part, was to ensure loyal government and to protect the rights of the blacks who were free as a result of the war.
Explanation:
Im not sure if this is 100% right, but I'm pretty sure this was the reason. Hope this helps.
The French navy assisted the US forces in the Battle of Yorktown
Long explanation: Marshall's ruling established the precedent of judicial review by which the Supreme Court has the final say on whether a law is constitutional or unconstitutional.
Short and simple Explanation: John Marshall established judicial review through it. The judicial review that was created allows a better system of checks and balances for the other branches of government to ensure that all actions are constitutional.
