In my first spoiler, I reported on the beginning of the Battle of Gao, when HC declared war on me in 150 BC.
The Battle of Gao would essentially be my entire game. For a millennium and a half!
After the first couple of waves, there was a break in the action, which let me chop the trees outside Gao, which made it easier for my sorties to eliminate stacks as they marched up to my city. HC still would never sign a ceasefire or peace treaty for any price less than Gao. And saving that city was central to my survival. Shaka was at war with me, too; before his army had a chance to arrive, I gave him COL for peace. He'd go on to fight a war against Hammy.
I finally met Kublai Khan in 620. In 780, he decided to join the war against me. I bought a peace treaty with him for some gold in 1060. But HC's armies kept coming, with their tech upgrading far faster than my own troops.
In 1090, Shaka declared war on me. I saw his army had nearly arrived at my border, when I paid him off with some more gold.
And still HC's armies kept coming. I had just eliminated another (smallish) one when I saw that Monty now had an army on my border.
HC was still demanding Gao. I had nothing to persuade Monty to call off him imminent attack, and there was no way to fight off that stack. Hammy was pleased with me, but could not be persuaded to come to my aid. In a desperate bid for survival, I gave Gao to Hammurabi. He did not have open borders with my enemies; if that corner of the map became Babylonian territory, my enemies would have to attack him to get to me! This gift improved his relationship to friendly.
Well...that trade put the adjacent squares into Babylonian control, but the hill was still mine, which left HC and Monty a clear path to my remaining cities. (On the next turn, Hammy's border shrank to just the city square.) Time for another desperate move: I bought peace from HC for Awdaghost (an insignificant city I'd settled on the western coast, which had since come under cultural pressure from Hammy), plus all of my 82 gold and 55 gpt. And now that I was
finally at peace, Hammy was willing to sign a defense pact. Perfect! Would this alliance persuade Monty to cancel his attack?
No, it wouldn't.
Monty attacked in 1370. As Hammy rushed a few units up to defend Gao, I left my defensive units in the city to help hold it, while pulling back my offensive units, hoping to be able to counter-attack if the city fell. This tactic failed; Monty captured Gao in 1410, with enough units to hold it. A turn later, his melee units upgraded to rifles.
(I noticed that HC had now upgraded his units to infantry.)
And then Hammy ruined my diplomatic maneuvering by calling an AP vote to "end the war against Hammurabi".
He had an overwhelming majority in the AP, so of course, the vote passed. Now I was alone again in my war against Monty, whose army was healing up before marching on my capital. The vote was only of limited benefit to Hammy, though, since Shaka declared against him in 1440.
I had enough. I retired in 1490.