What advantages did the North have over the South in finding generals during the US Civil War?

Most US generals came from the ranks of the graduates of the US Military Academy at West Point, New York. The North had a larger pool of military trained men then did the South. The pool of officers was larger for the North, no doubt. However, on both sides the general pool was diluted due to the necessity of making political generals. On a ratio basis, it can be debated that the South had a higher quality of possible generals.