Revise this passage so that it uses a formal style, precise language, and domain-specific vocabulary. Use the following domain-specific vocabulary in your revision: Blockade: The shutting of a port to keep people or supplies from moving in or out
Import: To bring products and goods into a country
Export: To send products and goods to another country
Passage
At the beginning of the Civil War, President Lincoln ordered the U. S. Navy to close off the ports along almost 3,500 miles of Atlantic coastline. This was so the Union could stop them from bringing products in and from sending their own goods out of the country. Though many smaller Confederate ships were able to get out of the ports, they only had a little bit of goods, and the South needed much more to support their economy.