What did the border states have in common with the southern states during the civil war?

During the Civil War, the border states—Delaware, Kentucky, Maryland, and Missouri—shared several similarities with the Southern states, particularly in terms of their economies and cultural ties. Both regions were heavily reliant on agriculture, with significant slave populations and plantation systems. Additionally, many residents in the border states held pro-Southern sentiments and sympathized with Confederate causes, despite remaining in the Union. This complex allegiance often led to internal conflicts and divided loyalties within the border states.