From the Civil War lecture, Select all that Apply:

At which battle did the U.S. Navy secure the entry to the Mississippi River, thereby "cutting the Confederacy in half?" How did they accomplish this?

Group of answer choices

a. Sixteen new iron-clad ships were sent to attack Mobile Bay, Alabama which resulted in the capture of that city and the feeding canals that led to the Mississippi River.

b. By getting US warships past the harbor defences of New Orleans, US troops were able to disembark and attack the city from the lightly protected rear. This was much easier than attacking the city from the seaward side.

c. The USS Hunley Submarine was so small that it was able to sneak into New Orleans through the sewer system and then could explode under the Armory there, which destroyed the city's defences.

d. Admiral Farragut "sped" US warships past the harbor defences at New Orleans.