http://www.washtimes.com/...112-120122-7344r.htm
Before springing Marines, Army soldiers and Iraqi forces on enemy-held Fallujah, the command in Baghdad thought there were at least 2,000 insurgents, and perhaps as many as 5,000. But the coalition forces have failed to find large clusters and now think that there might have been less than 1,000, military sources said yesterday. The senior defense official said some generals now think there might have been 600 or fewer.
via John Robb's weblog