A few states valued their membership in the United States of America more than their 'right' to slavery. These states were Delaware, Kentucky, and Missouri.
The state of Maryland was prepared to secede but was prevented by federal troops dispatched to their capital.
Washington, DC, while not a state, did permit slavery and did not attempt to join the Confederacy.
what were the slave state that did not secede and join the confederancy
The Confederate leaders wanted as many states as possible to join them. Whether non-slave states could join was moot, since all of the non-slave states were in favor of preserving the Union.
border states
11
The Northern slave-states of Kentucky and Missouri.
Richmond, Virginia was the capital of the Confederate States of America.
There was and even amount of slave and slave-free states
The North to maintain the Union The South to maintain the Confederancy
Kentucky, Missouri, Maryland, Delaware.
Kentucky, Missouri, Maryland.
The Border States were a key part of the US Civil War. They were slave states that did not join the Confederacy, it was important for the Union to prevent that they did not secede and join the South.
compromise of 1820