I now have the book, though I'm not finished with it yet. I first went to the Napoleonic portion on the use and treatment of foreign troops and it appears to me that the author is discussing the issue superficially and from a 'socialized' viewpoint and not a military one. It should be noted, and I don't believe the author expressed this idea/viewpoint very well, that foreign troops were disarmed in November 1813 because their loyalty was suspect. This was after Leipzig when some of the Saxon troops changed sides during the withdrawal and fired on French troops, and Bavaria had already changed sides. They were not disarmed merely because they were foreigners.

However, I have not finished the book yet, so I'll reserve judgment on it as a whole until I do.