During the American Civil War, the north and the southern armies had different goals, the Union at the beginning wanted to reunite the country, but later the goal changed to include the abolition of slavery. The Confederacy had a different goal, wanted to incorporate all slave states and secede from the Union.
To win the war the Union had to capture the Confederate territory and the Confederate just wanted to defend its territory.
After the capture of Port Royal, the Union noticed that it would be effective to make an economic pressure into the Confederates and establish a US military depot on the southeastern coast to carry out land and sea operations.
After the win of the Port Royal battle by the Union, the Confederates noticed that the coastline was too big to defend so the Confederates concentrated the defenses further inland, nearer the coastal railroads in the hope that reinforcements could be rushed to any danger point in time to prevent its capture.
The north and the south strategies were different during the American Civil War. The Union tried to unite the country during the beginning phase of the war but later it focused on the abolition of slavery in the country.
The Confederacy on the other hand wanted to unite the slave states together and break ties from the Union.
There was a conflict between the Union and the Confederate. The union wanted to win the country by gaining control over the confederate whereas the confederate aim towards protecting its territory.
To pressurize the confederate, the Union established a depot to carry on its land sea operations on the southeast port. The union tried to steal supplies from the port.
The Confederate on the other hand found it difficult to protect the huge coastline and hence tried to prevent the lands near port, railways, in hope of reinforcement to its control zone.
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