You can look it up yourself, It is common knowledge that all states had banned the slave trade. It should be easy to find.
The Northern slave ships is just my guess based on the fact that most of the shipping was from the N.E,
I don’t understand your meaning. 1808 was the limit on the slave TRADE by the US Constitution. What do you mean states banning trade?
Sounds to me as if you’re talking about the RevWar, not the CW.