Tanks and aircraft and...ships...you say? You seem to be fantasizing about dogfights and naval battles with civilians.
Really? Looks like you are all over 2nd amendment and how civilians can carry guns and how it could prevent tyrannical gov...
...but fact that modern military does have way, way better toys than civilians ever could have for some reason does not count. Riiight.
Have you ever heard of guerilla warfare? Google US v Vietcong for a quick primer.
Vietnam won because it was too much hassle for USA to continue war, not because USA was incapable of military victory there. On home ground that won't be option.
I will take aside this comparison is weak, since attacking other country is something different than civil war.
I think you are missing the angle where military does not have to shoot at all, if the civilians are unarmed.
History shows that if situation escalates enough, there
will be shooting at unarmed civilians (or at least order to do it). Did you slept under the rock last few decades? Did you not heard about various riots, civil wars and the like in various countries around the world?
History also teaches us such internal resistance movements can win on their own (without external help) only if local government is already very weak. Again, power wankfantasies of 2nd amendment folks are just that, fantasies. Get over it.
Just point and bark orders. Only if both sides are armed, the moral dilemma crops up.
Nonsense.
Peashooters. You think Americans only have access to peashooters. You are just precious.

I know in case of civil war they will be able to...
acquire... some better weapons. It has nothing to do with 2nd amendment, however. Newflash: even in countries where civilians cannot have guns they do have them in case of civil war or something like that. I know, crazy.