New York.
Maryland was extremely close to DC if we had lost maryland, the north would have surely lost the war, also Maryland was a border state, a border state was a state that allowed slavery but did not secede from the union
Maryland.
NO
Maryland was an important border state because it surounded DC. If Maryland seeced DC would be surounded by southern states and Lincoln would have no chance.
Maryland and North Carlina
Delaware and West Virginia
border state
Delaware shares a border with Pennsylvania and with Maryland.
Maryland
The border state of Maryland was a central state in the US Civil War, and had the border state of Delaware on its east, the Union State of Pennsylvania to its north, and the Confederate state of Virginia to its south.
Montana is on the Canadian border and is much farther north than Maryland.
President Abraham Lincoln was worried about Maryland because it was a border state and he thought the state might succeed from the union. Kentucky, Missouri, and Delaware were also at risk because they were border states.