The Complete Total War Unit Guide.

2. Medieval: Total War.
This section uses unit stats from Clan Berserks excellent unit comparison guide, you can get a copy here. All the units from the Viking Invasion add-on are covered in the third chapter; this chapter only covers plain Medieval. All unit sizes in this chapter are based on the one above default, medium. This gives sizes like 133 spearmen, 80 men at arms, 53 knights etc. Each unit has been placed in it’s appropriate section, it’s mostly common sense but the index at the beginning lists what’s where if you’re having difficulty.

All unit costs are taken from a list provided by Quokka. They are for the default unit size, to work out the costs for other unit sizes follow this formula:
1)Open "crusaders_unit_prod11.txt" in WordPad
2)Copy all content
3)Paste into Excel
4)Delete all columns except i)Unit Name, ii)Support cost and iii)Number of men
5)Multiply Support cost with 0.125, and multiply that with Number of men for each unit.
6)Example: peasants; 100 men(on default), support cost 3:
3 x 0.125 x 100 =37.5
7)If you want support costs for varying unit sizes just multiply "Number of men" with percentage increase.
This formula is thanks to Norseman. You can download a free excel viewer here.
Purchasing costs are listed for units you cannot build in the campaign; this is because you can use them in custom battles and multiplayer mode.  Support costs are listed for all units as you have to pay upkeep for units gained by crusading etc.

2.1 Spearmen
    *Feudal sergeants
    *Chivalric sergeants
    *Gothic sergeants
    *Italian light infantry
    *Muwahid foot soldiers
    *Nubian spearmen
    *Order foot soldiers
    *Saracen infantry
    *Spearmen
2.2 Archers and ranged units
    *Archers
    *Bulgarian brigands
    *Desert archers
    *Genoese sailors
    *Golden horde warriors
    *Hashishin
    *Janissary archers
    *Janissary infantry
    *Ottoman infantry
    *Trebizond archers
    *Turcoman foot soldiers
    *Crossbowmen
    *Pavise crossbowmen
    *Arbalesters
    *Pavise arbalesters
    *Longbowmen
    *Handgunner
    *Mamluk handgunner
    *Arquebusier
2.3 Swordsmen
    *Byzantine infantry
    *Feudal men at arms
    *Chivalric men at arms
    *Feudal foot knights
    *Gothic foot knights
    *Hospitaller foot knights
2.4 Axemen
    *Abyssinian guards
    *Ghazi infantry
    *Varangian guard
    *Vikings
    *Woodsmen
2.5 Pikemen
    *Pikemen
    *Swiss Pikemen
    *Swiss armoured Pikemen
2.6 Polearms
    *Billmen
    *Chivalric foot knights
    *Halberdiers
    *Janissary heavy infantry
    *Swiss halberdiers    
2.7 Barbarians and Religious Fanatics
    *Fanatics
    *Futuwwas
    *Gallowglasses
    *Highland clansmen
    *Nizaris
2.8 Peasants
    *Almohad urban militia
    *Militia sergeants
    *Muslim Peasants
    *Peasants
    *Urban militia
2.9 Knights
    *Feudal knights
    *Chivalric knights
    *Gothic knights
    *Knights Hospitaller
    *Knights of Santiago
    *Knights Templar
    *Early royal knights
    *High royal knights
    *Late royal knights
    *Teutonic knights
2.10 Heavy Cavalry
    *Armenian heavy cavalry
    *Gendarmes
    *Early Ghulam bodyguards
    *High Ghulam bodyguards
    *Late Ghulam bodyguards
    *Ghulam cavalry
    *Golden horde heavy cavalry
    *Kataphraktoi
    *Khwarazmian cavalry
    *Lancers
    *Mamluk cavalry
    *Ottoman Sipahi
    *Pronoiai Allagion
    *Teutonic sergeants
2.11 Missile Cavalry
    *Boyars
    *Byzantine cavalry
    *Sipahi of the Porte
    *Golden horde horse archers
    *Horse archers
    *Mamluk horse archers
    *Mounted crossbowmen
    *Spanish Jinetes
    *Turcoman horsemen
    *Turcopole
2.12 Light Cavalry
    *Alan mercenary cavalry
    *Hobilars
    *Lithuanian cavalry
    *Mounted sergeants
    *Polish retainers
    *Saharan cavalry
    *Steppe cavalry
2.13 Camels
    *Bedouin camel warriors
    *Berber camels
2.14 Naptha and Javelin
    *Almughavars
    *Kerns
    *Murabitin infantry
    *Naptha throwers
2.15 Artillery
    *Ballista
    *Bombard
    *Catapult
    *Culverin
    *Demi cannon
    *Demi culverin
    *Mangonel
    *Mortar
    *Serpentine
    *Siege cannon
    *Trebuchet