Why did the union go to extensive efforts to blockade Florida's ports and harbors?
A. The union wanted to prevent further slave trade.
B. The Confederacy's naval forces were a threat to the north
C. The union needed the cities near ports and harbors for training camps
D. The Condereacy's used Florida's ports and harbors as an important starting point for distribution of supplies
and troops
B. The Confederacy's naval forces were a threat to the north