How did the advantages of north at the start of the war continue to be advantages?

The Union ( North ) had a number of advantages over the Confederacy that continued to remain advantages for the following reasons:

1. The Union's advantage in manufacturing remained because most of the Union's factories were well out of reach from the Confederate Army. Robert E. Lee's attempt to capture Harrisburg Pennsylvania as example failed. The Union as well as the North did not expect anymore Confederate advances.

2. The Union's advantage in warships was immense compared to the South's. It would take a very long time for the Confederacy to catch up. Also, the Northern shipyards were well protected and had the ability to build more ships as needed.

3. The Union's population was far greater than that of the South. This was a large pool of possible soldiers. This advantage remained and there was no chance of this Northern advantage to be reduced.

4. Farmlands in the North, most of them, were out of reach from Confederate forces. This would remain so as the North had control of farmlands and cattle ranches in most of the Territories as well. The South's farm base was available to be attacked by the North and was.