The day to day activities and goals in the North and South
Those in the South believed that they were forming their own country and were a legitimate nation. They first had to prove their independence in order to achieve it
Confederate States of America only had to do enough damage to the invading army that its troops lost morale and politicians in Washington lost the popular support and political will to continue fighting.
His goal was to preserve the entirety of the United States, which could only be done by an all out defeat of and total surrender by the South. To accomplish this, the Federals had to stage a successful invasion and occupation of the South, never an easy task.