Potentially bullshit/autistic scenario:
Peak oil has occurred, daily life has reverted back to localized communities and localized production.
Few large cities/settlements remain
Mass exoduses from former petro-states to the west results in conflict
Shit has gone on for so long that modern weapons are either running out of ammunition, or being lost due to attrition (humor me on this one! Apply copious amounts of bullshitium). Black powder weapons are now being used.
Personal communication devices and NODs no longer work due to lack of batteries or the ability to charge them (not sure if this is accurate or not…)
How does one fight a war in this scenario? I have heard some on craptube say that “armies would revert back to mass formations and lines of battle” but that seems idiotic and suicidal. Fire and maneuver with muzzle loaders or bolt action rifles with black powder loads might also be problematic.
And what would be the most advanced weapon that could use black powder? Rifled muskets? Bolt action rifles? I personally suspect that semi/full-autos are out of the question - the fouling from the black powder would foul up the action. You might get a couple of shots off but then it would need to be cleaned.
What say all of you autists?