<P> To protect the national capital, Lincoln suspended habeas corpus and imprisoned without charges or trials one sitting U.S. congressman as well the mayor, police chief, entire Board of Police, and the city council of Baltimore . Chief Justice Roger Taney, acting only as a circuit judge, ruled on June 4, 1861, in Ex parte Merryman that Lincoln's suspension of habeas corpus was unconstitutional, but the president ignored the ruling in order to meet a national emergency . On September 17, 1861, the day the legislature reconvened, federal troops arrested without charge 27 state legislators (one - third of the Maryland General Assembly). They were held temporarily at Fort McHenry, and later released when Maryland was secured for the Union . Because a large part of the legislature was now imprisoned, the session was canceled and representatives did not consider any additional anti-war measures . The song "Maryland, My Maryland" was written to attack Lincoln's action in blocking pro-Confederate elements . Maryland contributed troops to both the Union (60,000) and the Confederate (25,000) armies . </P> <P> During the war, Maryland adopted a new state constitution in 1864 that prohibited slavery, thus emancipating all remaining slaves in the state . </P> <P> Kentucky was strategic to Union victory in the Civil War . Lincoln once said, </P> <P> I think to lose Kentucky is nearly the same as to lose the whole game . Kentucky gone, we cannot hold Missouri, nor Maryland . These all against us, and the job on our hands is too large for us . We would as well consent to separation at once, including the surrender of this capitol (Washington, which was surrounded by slave states: Confederate Virginia and Union - controlled Maryland). </P>

What states did not secede from the union during the civil war