WHAT WERE THE RESULTS OF JOAB'S CENSUS?

I Chronicles 21:5 And Joab gave the sum of the number of the people unto David. And all they of Israel were a thousand thousand and an hundred thousand men that drew sword (1,100,000): and Judah was four hundred threescore and ten thousand men that drew sword (470,000). (KJV) II Samuel 24:9 And Joab gave up the sum of the number of the people unto the king: and there were in Israel eight hundred thousand valiant men that drew the sword (800,000); and the men of Judah were five hundred thousand men (500,000). (KJV)

There are two possible answers to this. One has to do with the word 'valiant' in the 2 Samuel passage.  1 Chronicles is counting all men, while 2 Samuel is counting only the 'valiant' ones.  Unlike in English, where the word 'valiant' is simply a term that could apply to anyone to some degree, in Hebrew the word (which is 'chayil') refers to those who are trained for battle.  There were an additional 300,000 men who were, in a sense, in the military reserve.  They carried swords, but were not trained for battle. Another is that 1 Chronicles 27:1-15 mentions twelve divisions of 24,000 men each.  This adds up to 288,000 men.  It's possible that the author of 1 Chronicles counted these men, while the author of 2 Samuel did not.  This would account for the difference of nearly 300,000 men. As for the men of Judah, 1 Chronicles gives the number 470,000 while 2 Samuel gives 500,000.  The text states that Joab had not counted the tribe of Benjamin, which was known to be around 30,000 men.  The author of 1 Chronicles is giving the figure Joab actually gave to David, which did not count the tribe of Benjamin, while the author of 2 Samuel gives the number that were actually in Israel, and therefore added the number of the tribe of Benjamin.  Not a contradiction.