Folks always forget that CvC wasn't actually "done" with On War when he died. Only the first couple of books (chapters) were close to finished, with the others existing as drafts.

That said, it's also important to read old Carl in conjunction with Handel's masterful analysis of Carl, Sun Tzu, and other strategic thinkers. I have yet to see anyone tackle this subject in such an insightful and useful way.

I also agree with Slap that Carl is often misused, either by accident or by design.