In summary, there's good news and bad news:
GOOD NEWS: We've discovered ironworking. BAD NEWS: No iron near our city.
GOOD NEWS: We haven't lost Athens. BAD NEWS: We haven't retaken Sparta.
GOOD NEWS: We have an army to retake Sparta BAD NEWS: It may not be enough.
[0] - 380 BC. Athens is at max health and happiness, so I MM and get 3 shields in place of a 1health/2shield. Sparta currently has 2 archer defenders (we can see it from our culture, so don't need to scout.) I'm all for an attack, but we're gonna need a few more units, as the odds are nearly 2-1 for them, even with our best units (I'd say we need minimum 6 attackers for their 2 units + defense afterwards.) If we have iron near us it'll help, but waiting 20ish turns to get it doesn't seem very helpful at all. Since we don't need more food I stop our worker's farm - he'll build a road towards sparta
(under cover). So we can get units there and back for defense faster.
IBT While defending, your archer has killed an axeman
While defending, your archer has killed an axeman
Blah blah, blah blah blah blah a warrior
[1] 360 BC. Promote our archer in the field with cover. Move worker a square up and build a road. Move one archer into the forest to gain a promation against the barb, and the newly promoted one to defend the worker.
[2] 340 BC. Promote the new archer with Drill, and start on a warrior to get another free medic promotion.
[3] 320 BC. Archer in the woods wins. Nothing else to report.
[4] 300 BC. We fought the war and we won! But more war coming our way.
[5] 280 BC. Archer attacks our city and gets killed like the barbarian scum it is. A barb warrior moves around to our farm. Use our archers in the forest to attack and, naturally, win. Warrior is produced and given medic promotion, work started on another archer. We meet Victoria (it may have been last turn) who's the founder of Judaism.
[6] 260 BC. Worker starts on a road towards sparta with 2 archers +medic 1 warrior escort.
Our fighting forces so far (leaving 2 archers + medic warrior to defend):
2 archers, 1 medic warrior, and 2 other warriors.
I don't think it's enough by a long shot.
[7] 240 BC. THE ENEMY HAS BEEN SPOTTED NEAR ATHENS.
WHAT?!?!? WHERE?!? We aren't prepared.
[8] 220 BC. While defending,blah blah blah

While defending, blah blah blah
[9] 200 BC. Archer produces, start work on another one.
[10] 180 BC. We lose a City defense archer to 3 axemen attacks - I thought the comp was supposed to pick our uninjured one to fight in times like these. I guess we'll rebuild him soon enough, but this hampers the war effort.
[11] 160 BC. Archer defending worker gets a promotion.
[12] 140 BC. The barbs seem to be slowing down. Only 2 in sight.
[13] 120 BC. Archer gets produced and new one started. road towards sparta is complete.
[14] 100 BC. Athens' border expands, meaning the forest tile directly east of sparta is now under our control. Worker starts building a road directly into sparta, with defense. New archer moved into woods in hope of getting promotion against incoming barb.
[15] 80 BC. Promotion gathered as expected - given CoverI and moved towards sparta.
[16] 60 BC. Another archer with combat one moved into woods. A barb warrior is coming from the southwest, so I move our medic one warrior towards the hill in that direction. Hopefully he'll be able to win and get medic 2.
[17] 40 BC. Mao meets us. He's buddhist, but not the founder. Another archer given coverI and moved towards sparta. Medic warrior reaches hill.
[18] 20 BC. Warrior wins (barely) and moves back towards Athens - the long way round, to avoid the approaching axeman.
Another archer produced and moved north against incoming barb warrior - with 3 cover archers, and the 2 archers there, maybe sparta will be takeable? Worker sent towards pigs cause (a) it's safe. and (b) we do need health (as well as happiness) eventually.
[19] 1AD. We discover ironworking!!! but the only source is south, near the horses. I put the research to priesthood, so we can a temple for happiness, but the next person can change that. I'll call it quits here to even out the turns. NOTE: Our worker needs direction, and we have an archer just northeast of athens who'll have a promotion next turn. I was planning on giving him cover and moving to the city, but I'll let greater minds work on that descision as well.
Some pics, for your enjoyment:
The location of Iron:
The situation at Sparta:

There's also an archer with coverI coming towards the stack - will be there next turn IIRC.
Turn order:
Blackluck - UP
Liquidated - On deck
Luv_Muffin
Scowler
Percinho
Sir Toma
Greggo -- Surprisingly, didn't lose the game.
Good luck with that whole Sparta thing, Blackluck.
EDIT: Some quick thoughts. In retrospect, maybe an initial attack against Sparta (with 4 warriors/2 archers) may have won it rite away, but I'm a bit (over) timid in times like these. Also, I wonder if a settler, with 2-3 defenders may have been able to make a city near the horse (and keep it). Anyway, looking forward to comments on my game.
And the file: