Been a long-ass time since i touched any of this, and it all kinds bleeds together, but from very rough blurry memory:

Clausewitz is... Okay so I found him incredibly hard to read because i kept wishing I had a chance to go back in time and kick him in the dick, maybe when he was too old to chase me very far after, but basically about how conflict is about more than just killing dudes, and killing dudes is a means rather than an end.

Mao talks about fighting bigger foes and some on the role of the (non-fighting) people in war. How a force sustains itself in nontraditional circumstances.

Boyd is late 20th century american imperial air force; an information/attention guy. The OODA loop guy. Relevant in modern deeply bullshit war. There are other options, but like i said: I'm a systems pervert.

Lawrence covers some (but not all) of the ground of the last two from a more romantic and heroic (and older! He fought in world war 1! Boyd was a ds1 guy and Mao was Mao) perspective. And also is a better writer than Mao or whoever put together Boyd's stuff.