Norman, the following comes from Fox's Regimental losses:
"The eleven States of the Southern Confederacy had, in 1860, a military population of 1,064,193 with which to confront the 4,559,872 of the same class, belonging to the other States and Territories. This number was largely supplemented during each successive year of the war by those who attained their eighteenth year of age, at which time they became liable to military duty.

The phrase "military population," as used in the Eighth Census, represented the white males between the ages of 18 and 45, and included all who were unfit for military duty on account of physical or mental infirmities. These exempts--which include, also, all cases of minor defects--constitute, in every country, one-fifth of the military population. But the Confederate recruiting officers did not insist on any high standard of physical requirements. Their need was too pressing; and they accepted all recruits or conscripts except those whose disabilities manifestly incapacitated them for military service.

The Confederate States, however, could send to the war a far greater proportion of their military population than the Northern States, as they possessed a large agricultural population of blacks who were exempt from military service. The aggregate enrollment of the Confederate Armies during the whole war, according to their best authorities, numbered over 600,000 effective men; of whom not over 400,000 were enrolled at any time. These eleven States furnished, also, 86,009 men to the Union Armies, receiving in return over 19,000 men from the Border."

There is more information, speculating that the numbers given were low, and explaining why this could be true. The
link is: http://www.civilwarhome.com/confederatelosses.htm

It is very interesting reading, especially when you see that more men were killed and died of wounds, than from disease, contray to popular thought. Stan