[DoodleDawg]

At the end of the War of Northern Aggression, there were still several states that had slaves, such as: Kentucky, Delaware, Missouri, Maryland, and several others. They weren't freed until the Thirteenth Amendment was ratified, six months after the war ended.

Missouri, West Virginia, and Maryland had ended slavery on their own before the end of the rebellion. When the 13th Amendment was ratified only Kentucky and Delaware has slaves left to free.

[Svartalfiar]

Missouri, West Virginia, and Maryland had ended slavery on their own before the end of the rebellion. When the 13th Amendment was ratified only Kentucky and Delaware has slaves left to free.

Where did you get that? I'm not doing deep research, but even Wikipedia mentions:

Legally, the last 40,000-45,000 slaves were freed in the last two slave states of Kentucky and Delaware[179] by the final ratification of the Thirteenth Amendment to the Constitution on December 18, 1865. Slaves still held in Tennessee, Kentucky, Kansas, New Jersey, Delaware, West Virginia, Maryland, Missouri, Washington, D.C., and twelve parishes of Louisiana[180] also became legally free on this date.