Turn 2 (820AD): New Grand River's stack of Trebuchets makes easy work of a stack 2, taking all 3 defenders to 1HP and allowing the MW army (now on 12HP) to take 3 longbows out.
Rush a barracks in New Allegheny, and a couple of settlers in high food corrupt cities.
AI: Nada.
Turn 3 (830AD): Constantinople is easy to hold at the moment since the armies outside are not getting attacked, and we can pick off the slow units moving in to take it back, but it is holding up 3 of our armies, and we really can't afford that. Also we are not anywhere close to being able to send in lots of units to quell resistance.
I sell all improvements in Constantinople and gift it to the Incas, since we will eventually want it and the wonders it holds.
As usual I deal with minor infringements on our Byzantine border.
AI:

Oh well. I saw Incan ships off the coast and figured they would land in Constantinople, but in true AI fashion they land NEXT to the city instead, allowing the Byzantines to take it back.
Turn 4 (840AD): I build New Cattaraugus just NE of Constantinople and disband a worker there so I can rush a barracks this turn.
(see first pic)
As you can see, we have a good front we can defend here, and with a little skill and cunning we can make good headway against Byzantium.
The Trebuchet stack is doing an amazing job - bombard units really excel at defense against slow units. The Byzantine stack you can see near New Grand River gets almost completely annihilated.
New Allegheny gets a Harbour, and several cities with corruption in the 50 to 80% range get courthouses.
AI: Rome lands 6 units next to Bangalore. Inca start JS Bachs. Sumerians start Shakespeare's.
Turn 5 (850AD): The armies are fully healed and our units are grouped again. It only took me 5 turns.
(see second pic)
I take Nicomedia, in the end for no loss at all.
This is where I am ending it for the day. It has been extremely tough (one of the toughest wars I have ever fought), because our units are spread extremely thin, and because we went for Constantinople far too early.
The other issues I see in this game are the wasteful use of workers and wasteful builds. This is much more "lax" than I would ever play in one of my games, and I am very thankful that the AI seem to be pretty useless in their application of their shield bonus.
I'm not saying I wouldn't have units on the coast, but I certainly wouldn't normally have units in non-border cities.
I certainly wouldn't ever build Cathedrals if my cities are not going over size 12 (even then I would only build if lux's were impossible to find). The issue with WW is crazy in my mind. This is the second SG I've been in recently where we have level 4 WW in Republic after just 20 turns or so of fighting. I can't show where the WW we got was unecessary (since I didn't play the turns), but I've played quite a few games in my time and have
never hit level 4 WW. I just can't see how it can happen if you are careful.
Sorry if this seems like a bit of a rant, but after spending an hour looking at the save when I got it I was very suprised by how badly we have managed certain aspects of our empire (and this isn't just about the last 10 turns). Maybe it's just the amount of time I spend on each turn, but at Sid level I think we owe it to the game to spend
at least 30 mins a turn (I spend at least an hour a turn, often much more). Am I expecting too much? I certainly know from reading about all of you that everyone in this SG is very capable at this level of the game, so I don't think it is unreasonable we play to our abilities for a Sid level game.