It’s Fort Sumter, after Lincoln said that they weren’t launching an attack on the confederates. They were only replenishing the fort.
I believe the answer is: It was weakened and could not provide military protection.
Land reclamation refers to the process of creating new land by elevating the land that covered by the sea or lake and extracting the water out.
Due to the large budget for this project, the government have less money to be allocated for military supplies and soldiers.
