Technological advantage is not playing much role in real life, because it is usually very expensive, and (mostly) logistics and resources scarcity limit its usage.

Much more play geography and psychology, also extremely important economics, but to be strict, all these three things are strongly tied.

For this I know two excellent books: 1. Revenge of geography. Kaplan. 2. The strategy of indirect approach. Basil Liddell Hart. (He argues for indirect moves, but for me, all his examples about effective using geography and psychology).

And sure, best book on war for all times - the Art of war Sun Tzu, but should read from few translations simultaneously, because some missing important things and others are written too knotted.