Kentucky, because it was the only one invaded by a Confederate army that was able to set up a Confederate government - although that government collapsed when the army had to retreat.
Missouri was the scene of much guerrilla combat, but there was little risk of it actually joining the Confederacy.
Maryland remained a great worry to Lincoln, because it largely surrounded Washington. But he had jailed its pro-Southern leaders (unlawfully) at the beginning of the war.
The most vital Border State for the Union was the Maryland, for following reasons:
1) Maryland territory surrounded on three sides Washington DC, Union's Capital;
2) a secession of Maryland would have deprived the Union of the control over the Bay of Chesapeake, a pivotal strategic area.
Therefore, the Union couldn't tolerate (and didn't tolerate) any attempt aimed
to make Maryland secede from the Union.
They were border states for the Union and Confederate. Maryland was especially important because it contained the U.S. capital (Washington D.C.)
The border states were those states that bordered the states that seceded before the Civil War. The border states consisted of Kentucky, Delaware, Maryland, and Missouri.
The border states that wished to remain neutral during the Civil War were places that both sides could obtain goods from. Sometimes, there was conflict but most of the time the soldiers got what they needed and left.
yesDelaware Maryland and Kentucky border states
Border states like Maryland and Virginia
Maryland
Maryland
Kentucky
border states are states that were left in the union but stil had slavery.
Missouri and Tennessee border eight states, the most of any.
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.
Delaware (perhaps the most overlooked border state), Kentucky, Maryland and Missouri were the border states that did not secede from the Union.
It's a border city to the United States.
Tennessee and Missouri each border 8 other states.
Kentucky and Colorado are tied at the most with seven border states.
Its is because of their location and resources the border states could tip the scale toward one side.
Both Missouri and Tennessee border the most states, which is eight.