War's essential character has not changed and will not change. The specific techniques required for close combat will probably remain stable. Jones

I have to challenge you on this one, or at least ask for clarification. The nature of war has changed considerably, and will continue to do so. I'm not sure what you mean by the character of war though?
I think there may be some confusion over how we define terms here.

I for one, think the nature of war has not changed but that it's characteristics have, the nature of war is always political, although how it is fought and the methods used to fight it, the characteristics, the features of war have changed over time. Although character and nature can be mentioned in the same breath, for the sake of clarity that's how I define them.