(I'm copy pasting the opening from my other question here )
I'm currently working on a science fiction comic about humans marooned on an alien world for generations. My question is related to what effects this would have on peoples ability to engage in warfare.
This world is slightly larger and more metallic than earth with greater gravity a higher percentage of oxygen (I was thinking similar levels to the Carboniferous period here on earth 35-40%) and 3-4 earth atmospheres of pressure at sea level and a more comfortable level higher up where most humans live in domed habitats and can move around outside for limited periods with some protection. Days are exceptionally long lasting up to 3 months generating strong winds and storms, and the thick almost universal fog and cloud cover makes visibility spotty at the best of times.
The humans themselves are also highly resistant to damage with nano-machines swarming through their blood closing wounds combating infection repairing damage (even brain damage to an extent) and aiding in some functions such as oxygen transport and blood filtration. Calcium in the bones is replaced with a harder crystaline element (I haven't quite done the research on that yet but was leaning to something made from carbon like organic diamond graphene or nanotubes) the skin also has a thin mesh similar to spider silk between each layer which continuously grows sloughs off with the skin cells making individuals highly resistant to damage. A second single chamber heart sits just above the liver and many autonomous nervous functions are distributed in redundant clusters down the spinal column. Muscles are reinforced and axons are far more insulated or in some places replaced entirely with more conductive materials giving individuals superhuman close combat capabilities.
These modifications are universal, being either hardwired into everyone's genes or produced by the nanomachines which are inherited from the mother before birth.
I'm really flexible on all those numbers and concepts if they don't work/have a strong enough effect or aren't actually possible.
So, Finally to the questions, what kind of effect would this have on combat, are firearms or projectiles of any kind still viable? If so what extra challenges would they have to overcome? Would it be possible for close quarters combat to take the center stage in warfare under these conditions?
If everyone lives in enclosed domes where a breach or some damaged equipment holds the potential to kill a whole population how would fighting be viewed and how could the law be enforced if everyone is bulletproof and capable of casually kicking over a bus?
On a more philosophical slant, how might the common man respond to basically being Wolverine?
And finally are piracy tyrannical government military conquest or even petty violent crime even remotely possible under these circumstances?