I remember Babylon.
Once, when I had just started my very first game as Corea, I landed on a Pangaea map with the following civs in order of proximity: England, America, Tenochca, Songhay, Babylon and finally at the far side, Arabia. I think there was Gandhi in between Babylon and Arabia, but if he did he got conquered mighty quickly.
Anyways, at the time I had little clue about stealth bombers or proper artillery tactics, but I managed to war my way down south. Had a little war with George and Liz, took out Liz and got peace with George... the Great Wall was built by Monty, but I managed to whack him out with cannonae and riflemen.
That was the point in time when Babylon really runaway and I was staring at his WW2 Infantry with riflemen (he eviscerated both George and Monty leftovers). The thing about our lands was that there was a short landbridge (overlooking hilly Washington - now in Babylonian hands) and a lot of mountains separating both of us (and me from the Songhay).
I remembered attacking the Babylonians to keep them out of my side of Pangaea. With artillery. It worked well enough, but the thing was - Nebby didn't want peace. He had something like 20 odd cities I couldn't touch, and he was blast teching so fast it was insane, and he knew the advantage was his! If I had known better, I could have smashed my way through the Washingtonian chokepoint and took out half of his empire.
Instead, I settled for a
Changsha-style artillery holding action. A dozen artillery guns, most of them perched on hills behind an Aztec city close to the chokepoint or watching the northern sea. My end goal was to tech all the way beyond OMT to get nuclear missiles and 50,000+ gold (because I only knew of nuclear missiles and tons of gold to rushbuy 15 of them instantly back then).
The Babylonians kept harrassing me, first with their Infantries, then their air force of fighters and bombers, then MECH INF. I had a pretty wide empire (of puppets), but still, my gold income per turn was abysmal to my mind then. Only 150 gpt! That ain't getting me nuclear missiles every other turn!
So I waited and waited, the Babylonians becoming even more powerful (they bought off every CS except a friendly Cultural behind me). It was self-inflicted stalemate, and good lord it was horrible. I felt I couldn't take out the Babylonians at all, and this was on
King.
Then I was a couple turns to Ballistics. Nuclear Missiles.
I had a fighter up and running in a forward Aztec city (didn't know the power of Logistics Bombers too). Then suddenly, the Babylonians flew in 10 aircrafts into Washington.
I scoped. The next turn, that Aztec city went up in an atomic pyre. My monies was at a pitiful 10K. I immediately rushbought atomic bombs in another Aztec city I had annexed as a rushbuy center. Based them in a couple of forward cities.
Big mistake, Babylonian B-29 took out a chunk of them. I had one atomic bomb left, so I nuked Washington and there went the Babylonian airstack.
At that point, Nebby finally decided to have peace with me.
Phew, end of story right? He won a diplomatic victory 10 turns after that peace, and in the world of One More Turn, after the Songhay settled a spam city of their own behind my lines, after the Babylonians had bought off that one CS allied to me... Nebuchadnezzar went all DAARUM DAMELAY DE EERUSH SHU
I tried seeing myself out of this horrible stalemate, but at then I could only see nuclear missiles. And my gpt and treasury were too low for them.
(building 4 carriers and 12 atom bombs for her 6 cities 
