Let's start with the good news:
The only ancient UU that's nearby is the Hoplite, which is not an attacker.
And now on to the bad news:
![Wavey :wavey: :wavey:](/images/smilies/wavey.gif)
as I was under the same impression that you had 20 turns from contact to declare if you were already at war, I would have done the same thing as Alerun68 with those trades.
We're facing Hoplites with archers, so we need to use a stack (4+) when attacking them in cities. Since we don't expect them Hoplites to attack, wait until they get to favorable terrain to attack them.
We don't know Iron Working and will soon be at war with 2 more AI.
I'm thinking we need to place our cities on hills (red circle) for the added defense bonus. I like the red dot for production, but not for defense and it might be our farthest north city for a while.
I disagree with Bugsy on Mathematics. While catapults would be quite helpful, having Legionaires would be better.
I agree that the Great Library is probably our only chance to stay current on techs.
If we happen to get a GL, I'd propose an army (of legions if possible) and if we get a second GL save him for the Great Library.