* Delaware was a slave state but did not secede from the Union because of its strong economic ties to the North, its small size, and its fear of being invaded by the Union.
Kentucky
* Kentucky was a slave state but did not secede from the Union because of its strong economic ties to the North, its large population of Unionists, and its fear of being invaded by the Union.
Maryland
* Maryland was a slave state but did not secede from the Union because of its strong economic ties to the North, its large population of Unionists, and its strategic location between the North and South.
Missouri
* Missouri was a slave state but did not secede from the Union because of its strong economic ties to the North, its large population of Unionists, and its fear of being invaded by the Union.