This i do not know sadly but i did some research for you and google says and i quote
"When Virginia declared its secession from the Union in April 1861, Lee chose to follow his home state, despite his desire for the country to remain intact and an offer of a senior Union command. During the first year of the Civil War, Lee served as a senior military adviser to Confederate President Jefferson Davis".
Answer:
He found it unbelievable that anyone would be to the point of doing the brutal things they did.
Explanation:
Hope this helped!!
They haven't... They are still bound by the same constitution that previous presidents have.
Answer:
Great Britain and France wanted the Ohio river valley.