The total number of officers who resigned to serve the Confederacy after 1 Nov 1860 was less than 300. Many former officers who had left the service before the seccession crisis also served the Confederacy. I beleive over 300 West Pointers many of whom had left the Army served the Confederacy. The total authorized strength of our Army as of 1 Jan 1861, including the staff departmnts was 1040.