Thanks a ton for testing it for me!

So then, the only way to get a Medic 3 Gunship - is not upgrading this Cavalry to a Gunship until after i'd attach a GG to it, thus geting Medic 3 - and only then upgrade to a Gunship, right?
And yes, sure, i meant war times. When it's peace, it's closed borders and he ain't going anywhere at all - here's his last and only city:
Sure did, in the past. Nukes are awesome sauce to win "a victory" by force, yep. Except, i am not looking to win "a" victory. Instead, it's one hella long and specific kind of self-defined "victory" which i am after. That's why questions which i asked - were not about doing any usual war, too: usually, both Conquest and Domination, we don't care what happens "after" we win (by beating AIs harsh enough). But in this Evergreen game which i am now playing - it's different.
You see, i am looking to reforest the world. More precisely - to reforest over 40% of Earth2 map's land tiles (but then, there are plenty natural deserts, ice regions and some mountain tiles, so "40%" is actually most of tiles which are capable to have a forest) . And i need to do it without a single nuke (my or AIs') ever detonated, without a single meltdown of a Nuclear Plant (not even AIs') ever occuring, and with very limited amount of world-wide pollution produced. And you see, to reforest the world, i must construct Forest Preserves. Craptons of them. But they can only be built within my cultural borders - which means, my empire must span most of the world, to reforest it. And when this will be done - it's still one hella long time to the reforestation to actually happen: i read, each "reforestable" tile (grassland, plains or tundra with a nearby forested tile) - has 0.1% chance per turn to have a new forest grow, and Forest Preserve merely multiplies this chance by 8. So it'll take hundreds to thousands turns _after_ i "conquer" the world to reforest any significantly big reforestable area. During which time, the AIs like the one under the spoiler above - may well try declaring wars (outta desperation - they do that sometimes).
If that sounds interesting and/or crazy enough to you, then further details about my Evergreen game - i recently posted under the spoiler of this message:
https://forums.civfanatics.com/threads/the-eternal-peace.693091/post-16720729 . Wish me luck! %)