I'm also a Marylander. Here is more in depth explanation of what I know about Maryland's loyalty in the Civil War. At the lead up to the war, Maryland had remained relatively neutral in the squabbles over the expansion of slavery and state's right, which makes since knowing that Maryland's black population was equally divided about half and half between slave and free, compared to 90%+ slave in most Confederate states and 100% free obviously in Northern states. There was quite a bit of sympathy for the Southern cause in the beginning, with the state giving Lincoln only 2% of the vote in 1860. Then, a week after the siege of Fort Sumter began, there was a pro-Confederate riot in Baltimore in which rioters were shot upon by Union troops, though admittedly those rioters had attacked the soldiers with "bricks, paving stones, and pistols." That was the first bloodshed in the Civil War and Southern sympathizers compared it to the Boston Massacre, made ironic by the fact that many of the Union troops that did the shooting were from Massachusetts. A Marylander living in Lousiana at the time then made a song about it called "Maryland, My Maryland" which became known as the Marseillaise of the South. However, I would like to point out though that despite all this Southern sympathy, Maryland was not mostly pro-secessionist. It might have been close though without Lincoln's suspension of habeas corpus (No one seems to ever mention though that the Constitution allows that in case of rebellion, or that the Confederacy put that same clause in their Constitution, haha). In addition to that almost 80% of Marylanders that fought in the Civil War fought for the Union side. Not only that, but during General Lee's Maryland campaign leading up to Antietam, the local Marylanders' reaction to the Confederate army was cool disdain and the vast majority showed outright hostility.