What is the main conflict in Strategy by B. H. Liddell Hart?

This book is the sort that could serve quite well as a textbook on military strategy. It provides a historical overview of the subject from an undenied European bias from as far back as the fourth century BC up through the present. Describing real battles and the generals and great captains who led them is the method that the author uses to get the main principles of military strategy across to the reader.