Yeah... things happened in the world

but not in Aztec lands. We were being peaceful people building industrial districts in all cities. Until this turn
When teh declared on Sulla, and I had all these Jags still in the area (simply because it didn't make sense for them to be anywhere else), I suspected there was going to be an opportunity. I waited a couple of extra turns to make sure as many teh's units as possible were tied up in an attack on Sulla's city, and....
Yeah, that was easy so far. Frankfurt should be mine, then I'll see if I can something about Mainz. Unlikely, but depends how well teh's war is going. Considering he's attacking a city with walls and strength of 38, I expect not very well. So perhaps
Speaking of walls, I'm very surprised he didn't build anything defensive in his aggressively planted city. The problem with defending it just with units is obvious from the scenario above - they may be urgently needed elsewhere
Although he may have started building Walls, just couldn't finish it, and it can't be goldrushed
The core, as I said, is building districts
I'm hoping to have them done by the time I finish Stirrups, which is a slow research, but getting Knights earlier than other players, with productions base to build them relatively quickly, should give me more opportunities