There are a few unusual features to this song (which remains the Maryland state anthem to this day).
First off, it's set to the tune of O Tannenbaum, a.k.a. Christmas Tree. Which just seems like an odd choice to me.
Now, take a look at these lines:
Dear Mother! burst the tyrant's chain...Virginia should not call in vain!
Huzza! she spurns the Northern scum!
See that? This song dates back to the American Civil War, when Baltimore was kept under martial law by the Union so as to keep the northern approach to Washington, D.C. open. The basic message is "Give us half a chance, Union scum, and the 1st Maryland Regiment Infantry will kick the shit out of you like they did to the English." Not that they ever did; Maryland remained basically neutral in the War Between The States.
I figure it's only a matter of time before someone brings this up in Annapolis. Given that now is a time when the biggest controversy in South Carolina is whether or not to fly the Confederate flag at the state house, I figure we'd better start working on a new anthem now.