Among the most enduring innovations of 18th-century theory was the division of warfare into the formal levels of tactics and strategy. This has influenced our understanding of war, the division of command, and how military objectives should be selected—it is one of the most fundamental abstractions in military thought. Yet this conceptual division emerged surprisingly late, and in a far from straightforward manner. It is instructive to trace its evolution.
This four-part discussion is outstanding, both in its military understanding and your historiographical erudition.
That's a hugely comprehensive article, thank you.