Why did the citizens of Baltimore sink their ships in the harbor?

Fort McHenry

Their defense was augmented by the sinking of a line of American merchant ships at the adjacent entrance to Baltimore Harbor in order to further thwart the passage of British ships.

answer; /// i believe the correct answer is flash your high beams at them.or tap your horn;

if you have ask any question and if you have got the answer reply for your position there will be option for making a brain least answer you need to click click there and they can get the points in brain list main thing is that you need to choose those answer which answer you are you think that it is to you