Early/Light Tank (WWI Era):

M1917 - USA
Mk. A Whippet - England
A7V - Germany
Fiat 3000 - Rome, Ethiopia
Renault FT-17 (Russian Art) - Russia, Ottoman, Persia, Brazil
Renault FT-17 - France (France Art)
Renault FT-17 - China (China Art)
Renault FT-17 - Greece
Renault FT-17 Poland
Renault FT-17 All other civ's without early tank (Generic Unit)
Vickers M1936 - Netherlands, Egypt, Canada, New Zealand, Australia
Type 79 Ko-Gata - Japan
LK II Light Tank - Austria
STRV M21 - Sweden

Medium Tank (WWII Era):

M4 Sherman Easy Eight - USA
A12 Matilda II - England
Panzer IV Ausf H - Germany, Rome, Austria, Spain
Panzer VI Tiger I - Germany
T-34 - Russia
M15-42 - Rome
SOMUA S35 - France
M4A4 Sherman V - China
MTLS-1GI4 - Netherlands
Type 3 Chi-Nu - Japan
41M Turan II - Austria
Vickers MK II - Greece
10TP - Poland
Panzer IV Ausf G - All other civ's without Medium Tank (Generic Unit)
STRV M41 - Sweden

Modern Tank (Modern-Information Era):

M1 Abrams - USA
AMX Leclerc - France
Ariete - Rome
Centurion - England
Challenger 2 - England
Leopard 2 - Germany
Merkava - Israel, All other Civ's
T72 - Russia
T90 - Russia

Light Armor (Can carry Anti-Tank Missile, Can't Capture cities):

Bradley IFV - USA
BMP2 IFV - Russia
Dardo IFV - Rome
Marder IFV - Germany
Warrior IFV - England
Generic IFV - All other Civ's

Mobile Artillery (All Civs have a unit, the following civ's have unique art):

Austria, Candada, Egypt, Germany, Greece, Inca, Israel, Korea, Netherlands, Portugal, Arabia, Spain, USA

Mobile SAM (All Civ's have a unit):

Art goes by Allied, Axis, Desert and Green colors

Missiles:

Anti-Tank Missile - All Civ's (Carried by IFV)

Infantry:

Mobile Infantry - All Civ's (Information Age)

Tank Destroyers:

WWII Era - Tank Destroyers
Panzerjaeger I - Generic units for civ's without custom Tank Destroyer
PVKV M43 - Sweden
Semovente 75/34 - Rome
SU-76M - Poland
Type 1 Ho-Ni II - Japan
44M Zrinyi - Austria
AMR-35 ZT3 - France
ZiS-30 - China
Archer - England, Egypt
Jagdpanzer IV - Germany
M18 Hellcat - USA
SU-85 - Russia, Poland

Heavy Tanks:

WWII Era -

A22 Churchill - England, Arabia, Canada, Australia, New Zealand
IS-2 - Russia, China, Korea, Egypt, Israel
Char B1 - France
Panzer VIB King Tiger - Germany
M26 Pershing - USA
20-25 TP - Generic, All civ's without specific Heavy Tank
44M TAS - Austria
P26-40 - Rome
Strv-81 Sweden
Type 4 Chi-Ri - Japan

Super Heavy Tanks:

WWII Era - *Note - These are Unique Units, not all Civ's will have these.

A-39 Tortoise - England
Char 2C - France
IS-7 - Russia
Panzer VIII Maus - Germany
T-95 - USA
Type 100 O-I - Japan

WWII Era Self Propelled Guns (SPG) better known as Artillery:

43M Zrinyi II - Austria
Sd. Kfz. 165 Hummel - Germany
ISU-152 - Russia, Poland, China, Korea, Egypt
Lorraine 37L - France
M-40 Long Tom - USA
Semovente M41M-90/53 - Rome
M7 Priest - England, Canada, Australia, New Zealand, Israel
Stormartillerivagn M43 - Sweden, Generic Units for All civ's without Unique Unit
Type 4 Ha-To - Japan

Light Tanks - WWII Era
41M Toldi II - Austria
A10 Valentine - England, Canada, Australia, New Zealand, Persia, Portugal
L6-40 - Rome
M3 Stuart - USA
Panzer I - Germany, Generic Units for all civ's without a unique Light tank
Renault R40 - France
Strv M40 - Sweden
T-26 - Russia
T-26B - China
Type 3 Ke-Nu - Japan
Vickers 1936 - Dutch
Vickers Mk. E - Greece, Poland, Siam

WWII Era Special Tanks:
A-34 Comet - England
Bt-7 - Russia
Panzer V Panther - Germany

Industrial Era -
Riflemen for All Civ's
--Unique art for, Egypt, France, Germany, Iroquois, Ottoman, Arabia, Austria, Aztec, Babylon, Celts, China, Denmark, Egnlish, Greek, India, Japan, Mongol, Netherlands, Persia, Siam, Spain, Sweden, Russia, USA