First Things First:
Click on each magnifying glass to learn more about the source.
Mansion House was a hotel that became a hospital during the war.
Camp Convalescent was a hospital complex called "Camp Misery" by the soldiers.
L'Ouverture Hospital was a former pen for holding slaves awaiting sale that became a hospital for African American soldiers.
Think about it:
Look at the sites that are highlighted (marked). What function does the largest number of buildings serve? Why might that be?