1. Teeth

Light Tank Battalion
Tank is:(d8):
1: BT-5 M33
2-3: BT-7-2 M37
4: BT-7M M39
5: T-26B M33
6-7: T-26S M37
8: T-26E

Bttn HQ: 2x Tanks
4 Companies@

CHQ: 2x Tanks
4 platoons@ 3 Tanks

1 Support Platoon: 3x OP-7A (if any BT fielded) or 3x BT-7A (if BT-7-2) or 3x T-134 (if T-26S) or OT-133 M37 (if T-26S or E) or 3x OT-130 M33 (if T26B)

Motor Rifle Battalion

Bttn HQ: 1 rifle sqd, 1 truck
3 Companies@
CHQ: 1 rifle sqd, 1 truck
3 platoons@ 3 rifle sqds, 2 LMG, 3 trucks
1 platoon: 2x MMG, 2 LMG teams, 3x 50mm, 3 trucks

1 Support Company:
CHQ: 1 rifle sqd, 1 truck
1 platoon: 4 or 6x 45mm M37 A/T guns, truck or Komsomlet tows
3 platoons@ 4 MMG, 2 trucks
1 battery: 6x 82mm mortars, 6 trucks, radio truck

Divisional Recce Battalion

Bttn HQ: 1 rifle sqd, 1 truck
1 Recce Platoon: 2 rifle sqds, 12 LMG, 21 M/C Combos
1 Tank Company:
CHQ: 2x T-38 or T-40
3 platoons@ 3x T-38 or T-40

1 Armoured Car Company:
CHQ: 1x Ba-10 or Ba-20 or Ba-32
3 platoons@ 3x AFV as in CHQ

2. Brigade Support

Light Tank Brigade (or Regiment)
HQ: 3x tanks as in battalion

Motor Rifle Brigade

HQ: 2 rifle sqds, 2 LMG, 2 trucks with up to:
1 Gun Battery: 6x 76mmL16 M27, 6 trucks, Obsolete FC
1 Armoured Car Company:
CHQ: 1-3x Ba-10 or Ba-20 or Ba-32
3 platoons@ 2-4x AFV as in CHQ

3. Divisional Support

Up to:

0-6 Medium Tank Companies@
CHQ: 2x T-34/76A (March 1941+)
2-4 platoons@ 3x T-34/76A

0-6 Heavy Tank Companies@

CHQ: 1x KV-1 M39 or M40 or M41
2 platoons@ 3x KV-1
1 platoon: 3x KV-1 or KV-2A or B

1 AA Regiment: 3 batteries@ 6x 37mm M39, 6 trucks OR 4x ZIS-5 (Quad MMG on truck)

3 Engineer Companies@

CHQ: 1 rifle sqd, 1 truck
3 platoons@ 3 rifle/engineer sqds, 0-1 flamegun, 3 trucks
2 Artillery Battalions@
BHQ: 6 rifle sqds, 4 lorries, radio van
2 batteries@ 6x 122mm M38, 6 lorries or STZ-5 tractors
2 Artillery Battalions@
BHQ: 6 rifle sqds, 4 lorries, radio van
2 batteries@ 6x 76mm M36, 6 trucks or T-26T tractors
1 Artillery Battalion:
BHQ: 8 rifle sqds, 1 radio van, 6 lorries
2 batteries@ 6x 152mmL24 M38, 6x Komintern tractors

4. Mechanised Corps Support

Up to:

3 Flights@ 4x U-2 (Po-2) scout planes

3 Pioneer Companies@

CHQ: 1 rifle sqd, 1 truck
3 platoons@ 3 rifle/pioneer sqds, 3 trucks

3 Motorcycle Companies@

CHQ: 1 rifle sqd, 2 LMG, M/C Combos
3 platoons@ 3 rifle sqds, 5 LMG, M/C Combos

5. Notes

a) Radios are in Bttn HQs and BT-7A, possibly in CHQs. Radio equipped BT-5 and T-26B have frame aerials and must be pointed out if requested. Artillery is Assigned or Obsolete FC.
b) Infantry have RPG-1940 A/T grenades, and in 1941 can add 1 PTRD41 per platoon.
c) The division has 1-3 Tank Regiments each of 2-4 Light Tank Battalions and 1 Motor Rifle battalion. Most divisions were understrength, as 50% of divisions have a Motor Rifle Brigade of 3 Motor Rifle battalions. 20% of divisions have the Recce Battalion. 40% of divisions have the divisional artillery.
d) The division is also supposed to have 2 Medium Tank battalions and 2 Heavy Tank Battalions each of 3 companies. In practice they were split up if present, hence they are included as divisional support rather than teeth arm.
e) Some divisions were also independent, 2 in the Far East lasting until 1946. Most Tank Divisions belonged to reformed Mechanised Corps, at 2 per corps plus one Motorised Division (List R13). These Corps were disbanded from August 1941.
f) Note in service date of: KV-1A M40 (Mar'41); KV-2B(mid'41); KV-1B M41(mid'41); T-134(May'41); T-40(Mar'41);