...se the reduction by the three above mentioned causes would be 7,500; the increase by addition of three brigades, 6,500, and therefore the net decrease, 1,000, leaving the effective force under Lee in Pennsylvania and Maryland the 1st of July at 73,500 men. If we deduct the cavalry on both sides, we can say that the Southern general fought with 62,000 or 63,000 men and 190 guns the 80,000 or 82,000 men and 300...