I have actually just begun a campaign in heroic age Greece, so I happen to have a bunch of facts on hand:
Armor:
As mentioned above, Greek hoplites wore bronze helmet, bronze breastplate or linothrax (linen stiffened with resins), bronze and tin hoplons, and (usually) tin greaves.
The reason that the Greeks continued to use bronze for their armor rather than iron is because of their method of manufacture. Since iron is forged, rather than cast, and tends to be more brittle than bronze, early armorers couldn't forge iron armor to match the curves of the body well enough. Weapons were easier since they were flat and straight.
I have no idea why they used tin for their greaves, but they did.
Nobody is really sure how heavy Linothrax armor was. I replaced studded leather with it.
Remember the Greeks didn't have chainmail, so you need to eliminate chainmail and chain shirt also.
Finally, is you are placing a Mycenaen-age campaign, archeologists have discovered a set of articulated plate armor. Do a google search for "Dendra Armor." IMC, I gave it half-plate stats and said that it was only used for charioteers.
Territorial Maps:
You will find it difficult to find good territorial maps because the territories controlled by city-states were very fluid. To begin with, cities and villages regularly switched both who they were allied with and the depth of their alliance; for example, how would you classify the land surrounding a small village that usually supported Athens against Corinth, but would stay neutral between Athens and Sparta? Second, the terrain and nonprofessional nature of their armies (except for Sparta) meant that the Greeks had large difficulties in projecting their military power over land.
Resources:
I used the following sources, although remember that my campaign is set in Heroic (Mycenaen) Greece rather than Classical Greece.
Boardman, John, et al. (ed.), Oxford History of the Classical World.
Bulfinch, Thomas. Bulfinch’s Mythology - The Age of Fable or Stories of Gods and Heroes (
http://www.bulfinch.org/)
Durant, Will. The Life of Greece.
Elliot, Paul. Heroes of Delphi (
http://www.geocities.com/zozergames/delphi-intro.html)
Encyclopedia Mythica (
http://www.pantheon.org/)
Georg Luck, Axis Mundi.
Hare, J.B. (ed.). Sacred Texts (
http://www.sacred-texts.com/index.htm)
Homer, The Iliad (Robert Fagles trans.).
Homer, The Odyssey (Robert Fagles trans.).
Kaine, Thomas M., GURPS Egypt.
Keegan, John. History of Warfare.
Osborne, Robin, Greece in the Making 1200-479 B.C.
Oxford Classical Mythology Online (
http://www.oup-usa.org/sc/0195143388/index.html)
Parada, Carlos. Greek Mythology Link (
http://homepage.mac.com/cparada/GML/index.html)
Perseus Digital Library (
http://www.perseus.tufts.edu/)
Short History of the Trojan War (
http://www.stanford.edu/~plomio/history.html)
Zeigler, John F., GURPS Greece.
I have a rather large player's handout (including simple maps) I could send you if you're interested.
BM