Answer:The first and most well seen advantage at the beginning of the war was the psychological advantage; the Southerner's home was being invaded and they needed to protect themselves, their families, and their way of life.
Step-by-step explanation:
Southerners enjoyed the initial advantage of morale: The South was fighting to maintain its way of life, whereas the North was fighting to maintain a union. Slavery did not become a moral cause of the Union effort until Lincoln announced the Emancipation Proclamation in 1863. i hope this helped a bit!