With this pace I'll be done in just a few decades.
First game was in 2003 so I will manage.
WWI bomber: total randomness besides little damage and big chance of missing the target
"Strategic Bombing" - randomly destroy building, population, extra, damage unit or miss.
Sounds like a Zeppelin or Gotha bomber raid in WWI
WWII bomber: strong but little effect on small cities and not always precise
Are you asking for a semi-targeted variant? I mean a variant that has a target but may miss and hit nothing or something else? In that case we need one action for each target kind (unit, population, building, extra). Does strong mean higher probability of doing damage vs "Strategic Bombing"?
An action for each target would be the best long term solution so you can play with the variables. My thought was an aerial bomb attack that hits buildings, population, infrastructure and units; only one of them or nothing. More of a random thing.
And yes, simply higher probabilities between WWI, WWII and Cold War but that is a ruleset thing.
cold war bomber and upward: precise population and/or city structure/rail destruction.
"Surgical Strike Building" - precise city structure
A variant of Pillage that is instant and can target the adjacent tile (if you wish to destroy rail in cities)
A variant of Poison City that isn't a Spy action.
"Attack Specific Unit" or "Surgical Strike Unit" (planned but not started, could be years away) if you forgot to mention units.
Yeah, I guess whoever makes his ruleset can decide if he wants the cold war bomber to have surgical strike or a simple carpet bombing with high probabilities of hitting structures/population/units/infrastr.
Sure, an instant pillage that can target adjeacent tile sounds fantastic. Same for the poison city variant!