A series of lectures, presumably to American soldiers or cadets. Each Captain gets about 30 pages of detail and analysis, which gives room for only the briefest and general details. Alexander and Hannibal are examined primarily through the lenses of Hydaspes and Cannae, while the rest have their campaigns more completely described--I think Napoleon is described the most successfully, Gustavus or Frederick the least.
In general the Captains are compared only indirectly, with few declarations of one or the other's superiority. (Frederick, for example, is proclaimed the best tactician.) The most interesting parts of each lecture are usually the last 8 or 10 pages of analysis, where there a few gems, while the overviews of campaigns and battles are too rushed and generalized to be satisfying, unless a quick overview is all that's desired. ( )