This modification includes some Spartan/Hellenic and Persian themed weapons, armours, shields, helmets, boots and of course troops to go with these. Look for Details below to get access to these.

You can enable the Sparta_Faction mod to replace the Empire troop tree with hellenic/spartan troops and change the names of Lords to be Hellenic. 

You can give yourself the troops  using the Developer Console with Alt+^ or whatever your countries' Hotkey Combination is like and use the "campaign.give_troops unit number" Command.
example:
campaign.give_troops hellenic_helot 500
gives you 500 Hellenic Helots

Spawn-Codes: (There are more troops now but I lost the overview of all the troops)
black_cloak_hoplites  (Mercenary)
hellenic_helot
hellenic_hypaspist
hellenic_peltast
hellenic_militia_toxotes
hellenic_toxotes
hellenic_toxotes_armoured
cretan_toxotes
cretan_elite_toxotes
hellenic_phalanx
hellenic_militia_hoplite
hellenic_hoplite
hellenic_elite_hoplite
hellenic_armoured_hoplite
hellenic_hoplite_sword
hellenic_scout
hellenic_light_hippeis
hellenic_medium_hippeis
hellenic_heavy_hippeis
hellenic_medium_prodromoi
hellenic_heavy_prodromoi
hellenic_tarantine_cavalry
hellenic_heavy_tarantine_cavalry
spartan_helot
spartan_hypaspist
spartan_peltast
spartan_militia_toxotes
spartan_toxotes
spartan_toxotes_armoured
spartan_phalanx
spartan_militia_hoplite
spartan_hoplite
spartan_armoured_hoplite
spartan_hoplite_sword
spartan_armoured_hoplite_sword
spartan_bodyguard
spartan_bodyguard_sword
spartan_caravan_master
spartan_hoplite_300
spartan_hoplite_sword_300
persian_sparabara
persian_archer
persian_axe_warrior
persian_cataphract
persian_immortal

You can enable cheat_mode (even with console "config_cheat_mode 1") open your Inventory and look for Greek/Spartan/x XYZ.

Item-List: (Not always 100% accurate and will probably be removed from info later as the mod progresses)
Corinthian Helmet (with various team-coloured side-crest variations)
300-Style Helmet (with various team-coloured front- and side-crest variations)
Braided Hat (the weaved
Pilos Helmet
Phrygian Helmet
Greek/Spartan Cuirass (Variants)
Greek/Spartan Linothorax
Greek/Spartan Tunic
Greek Greaves (Sandals with 2 Bronze Greaves)
Greek Shoes (Sandals)
Greek Bracers (Bronze Arm Bracers)
Greek/Spartan Cape (Variants)
Greek Dory (Closest Replica created with the crafting-system)
Greek Javelins (Stacked throwable spears for ranged units)
Greek Xiphos (Extended Native Xiphos, which better fits for the Hellenic Faction Units)
Spartan Loincloth (Leather Underwear in 300-Style)
Spartan Xiphos (300-Style Sword with different Material Variants)
Spartan Round Shield (Dozens of Variants including Teamcoloured ones and a 300 one)
Persian Round Shield (Small Aspis with Persian Banner imprinted)
Persian Immortal Shield (Hourglass-Style Shield with a Teamcolor Variant aswell)

All Items can be found in Empire/Aseria Regions if they dare to appear. They are of course heavily priced and might not be affordable in a normal campaign I suggest enabling cheats and just grabbing what you want.

This started to be a test-module for being one of the first of its kind with new meshes in Bannerlord.
I hope I can further expand this module to create even more greatness.

Future Plans:
More Pilos Helmet Variants
More Thracian/Phrygian Helmets
More cool Hairs for Helmets
Chalcidian Helmets
Illyrian Helmets
Attic Helmets
Boetian Helmets
Greek Caps in general for light units
More Cuirass Variants (the armor)
Redesign the troop tree
Redesign some items to look more accurate historically
Improve Cloth physics for some items
Completely making this mod it's own unique faction. (Still have to learn how this is done though)
Some Fantasy-Themed Greek-associated weaponry and armory as easter-eggs (Like Age of Mythology stuff)
Persian Stuff as enemies
Maybe going completely crazy and adding more Athenian(and other greek) stuff aswell (There was a 300 Rise of an Empire after all)