I'd be curious to see how these techniques compare to Fairbairn's "Get Tough". That book covers the training given to British commandos and US troops during WWII. Mostly simple strikes and how to use available weapons, even a small stick, to incapacitate and kill an enemy.

The book is illustrated with drawings demonstrating the techniques. In one a soldier is showing the "Pony kick", which is jumping with both feet on the chest of the enemy to cave his ribs in. A tommy is shown in mid jump about to deliver the death blow to an German soldier. I always enjoyed how nonchalant both of them seemed about the whole thing.

Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!