RE: Colombo Raided
Posted: Tue Feb 16, 2010 7:59 pm
by Andy Mac
Better day for the allies inthe air as my combined flak and fighters 34 enemy aircraft down today.....
Good o
AFTER ACTION REPORTS FOR Apr 08, 42
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Morning Air attack on 6th Australian Division, at 29,48 (Colombo)
Weather in hex: Moderate rain
Raid detected at 32 NM, estimated altitude 21,000 feet.
Estimated time to target is 10 minutes
Japanese aircraft
A6M2 Zero x 7
Ki-43-Ia Oscar x 2
Ki-43-Ic Oscar x 2
Allied aircraft
P-39D Airacobra x 2
P-400 Airacobra x 7
P-40E Warhawk x 13
Japanese aircraft losses
A6M2 Zero: 2 destroyed
CAP engaged:
8th PG/36th PS with P-39D Airacobra (0 airborne, 0 on standby, 0 scrambling)
2 plane(s) not yet engaged, 0 being recalled, 0 out of immediate contact.
Group patrol altitude is 29000
Time for all group planes to reach interception is 29 minutes
AVG/2nd Sqn with P-40E Warhawk (0 airborne, 9 on standby, 0 scrambling)
4 plane(s) not yet engaged, 0 being recalled, 0 out of immediate contact.
Group patrol altitude is 29000 , scrambling fighters between 11000 and 23000.
Time for all group planes to reach interception is 30 minutes
58th PG/67th PS with P-400 Airacobra (0 airborne, 5 on standby, 0 scrambling)
2 plane(s) not yet engaged, 0 being recalled, 0 out of immediate contact.
Group patrol altitude is 10000 , scrambling fighters between 10000 and 23000.
Time for all group planes to reach interception is 27 minutes
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Morning Air attack on 6th Australian Division, at 29,48 (Colombo)
Weather in hex: Moderate rain
Raid detected at 120 NM, estimated altitude 25,000 feet.
Estimated time to target is 38 minutes
Japanese aircraft
Ki-43-Ic Oscar x 19
Ki-48-Ib Lily x 12
Allied aircraft
P-39D Airacobra x 1
P-40E Warhawk x 8
Japanese aircraft losses
Ki-43-Ic Oscar: 1 destroyed
Ki-48-Ib Lily: 1 destroyed, 5 damaged
Allied aircraft losses
P-40E Warhawk: 1 destroyed
Aircraft Attacking:
9 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
3 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
CAP engaged:
8th PG/36th PS with P-39D Airacobra (0 airborne, 0 on standby, 0 scrambling)
(1 plane(s) diverted to support CAP in hex.)
0 plane(s) not yet engaged, 0 being recalled, 1 out of immediate contact.
Group patrol altitude is 29000
Time for all group planes to reach interception is 35 minutes
AVG/2nd Sqn with P-40E Warhawk (5 airborne, 0 on standby, 0 scrambling)
(8 plane(s) diverted to support CAP in hex.)
5 plane(s) intercepting now.
0 plane(s) not yet engaged, 3 being recalled, 0 out of immediate contact.
Group patrol altitude is 29000
Raid is overhead
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Morning Air attack on 85th British AT Gun Regiment, at 29,48 (Colombo)
Weather in hex: Moderate rain
Raid detected at 200 NM, estimated altitude 31,000 feet.
Estimated time to target is 58 minutes
Japanese aircraft
Ki-21-Ic Sally x 6
Ki-21-IIa Sally x 24
Ki-43-Ia Oscar x 3
Ki-43-Ic Oscar x 11
Allied aircraft
P-40E Warhawk x 2
Japanese aircraft losses
Ki-21-Ic Sally: 1 destroyed, 5 damaged
Ki-21-IIa Sally: 5 damaged
Allied ground losses:
Guns lost 1 (0 destroyed, 1 disabled)
Aircraft Attacking:
11 x Ki-21-IIa Sally bombing from 28000 feet
Ground Attack: 4 x 250 kg GP Bomb
3 x Ki-43-Ic Oscar sweeping at 19000 feet
7 x Ki-21-IIa Sally bombing from 28000 feet
Ground Attack: 4 x 250 kg GP Bomb
6 x Ki-21-Ic Sally bombing from 25000 feet
Ground Attack: 4 x 250 kg GP Bomb
6 x Ki-21-IIa Sally bombing from 28000 feet
Ground Attack: 4 x 250 kg GP Bomb
CAP engaged:
AVG/2nd Sqn with P-40E Warhawk (1 airborne, 0 on standby, 0 scrambling)
(1 plane(s) diverted to support CAP in hex.)
1 plane(s) intercepting now.
0 plane(s) not yet engaged, 0 being recalled, 1 out of immediate contact.
Group patrol altitude is 29000
Time for all group planes to reach interception is 49 minutes
Also attacking 1st RM Heavy AA Regiment ...
Also attacking 23rd Indian Div /13 ...
Also attacking 18th Australian Brigade ...
Also attacking 25th Australian Brigade ...
Also attacking Colombo Fortress ...
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Morning Air attack on Colombo Fortress, at 29,48 (Colombo)
Weather in hex: Moderate rain
Raid detected at 200 NM, estimated altitude 28,000 feet.
Estimated time to target is 68 minutes
Japanese aircraft
Ki-21-Ic Sally x 12
Ki-43-Ia Oscar x 1
Ki-48-Ib Lily x 9
Allied aircraft
P-40E Warhawk x 1
Japanese aircraft losses
Ki-21-Ic Sally: 2 damaged
Ki-48-Ib Lily: 4 destroyed, 3 damaged
Aircraft Attacking:
12 x Ki-21-Ic Sally bombing from 25000 feet
Ground Attack: 4 x 250 kg GP Bomb
3 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
3 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
CAP engaged:
AVG/2nd Sqn with P-40E Warhawk (0 airborne, 0 on standby, 0 scrambling)
0 plane(s) not yet engaged, 1 being recalled, 0 out of immediate contact.
Group patrol altitude is 29000
Time for all group planes to reach interception is 13 minutes
Also attacking Eastern Fleet ...
Also attacking Colombo Fortress ...
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Morning Air attack on 6th Australian Division, at 29,48 (Colombo)
Weather in hex: Moderate rain
Raid detected at 200 NM, estimated altitude 26,000 feet.
Estimated time to target is 63 minutes
Japanese aircraft
Ki-21-IIa Sally x 4
Ki-43-Ia Oscar x 1
Ki-43-Ic Oscar x 11
Ki-48-Ib Lily x 29
Japanese aircraft losses
Ki-21-IIa Sally: 2 damaged
Ki-48-Ib Lily: 13 damaged
Allied ground losses:
5 casualties reported
Squads: 0 destroyed, 0 disabled
Non Combat: 0 destroyed, 1 disabled
Engineers: 0 destroyed, 0 disabled
Aircraft Attacking:
12 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
6 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
11 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
4 x Ki-21-IIa Sally bombing from 28000 feet
Ground Attack: 4 x 250 kg GP Bomb
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Morning Air attack on KNIL Army Command , at 49,101
Weather in hex: Clear sky
Raid spotted at 45 NM, estimated altitude 10,000 feet.
Estimated time to target is 14 minutes
Japanese aircraft
Ki-48-Ib Lily x 20
Japanese aircraft losses
Ki-48-Ib Lily: 4 damaged
Allied ground losses:
6 casualties reported
Squads: 0 destroyed, 0 disabled
Non Combat: 0 destroyed, 1 disabled
Engineers: 0 destroyed, 0 disabled
Aircraft Attacking:
9 x Ki-48-Ib Lily bombing from 6000 feet
Ground Attack: 4 x 100 kg GP Bomb
11 x Ki-48-Ib Lily bombing from 6000 feet
Ground Attack: 4 x 100 kg GP Bomb
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Morning Air attack on KNIL Army Command , at 49,101
Weather in hex: Clear sky
Raid spotted at 22 NM, estimated altitude 9,000 feet.
Estimated time to target is 6 minutes
Japanese aircraft
Ki-21-IIa Sally x 10
Japanese aircraft losses
Ki-21-IIa Sally: 1 destroyed, 2 damaged
Allied ground losses:
5 casualties reported
Squads: 0 destroyed, 0 disabled
Non Combat: 0 destroyed, 1 disabled
Engineers: 0 destroyed, 0 disabled
Aircraft Attacking:
10 x Ki-21-IIa Sally bombing from 6000 feet
Ground Attack: 4 x 250 kg GP Bomb
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Morning Air attack on TF, near Trivandrum at 27,43
Weather in hex: Clear sky
Raid detected at 40 NM, estimated altitude 18,000 feet.
Estimated time to target is 15 minutes
Japanese aircraft
G3M2 Nell x 8
Allied aircraft
P-39D Airacobra x 16
P-40E Warhawk x 3
Japanese aircraft losses
G3M2 Nell: 3 destroyed
CAP engaged:
50th PG/11th PS with P-40E Warhawk (3 airborne, 0 on standby, 0 scrambling)
(3 plane(s) diverted to support CAP in hex.)
3 plane(s) intercepting now.
Group patrol altitude is 15000
Raid is overhead
8th PG/35th PS with P-39D Airacobra (5 airborne, 8 on standby, 0 scrambling)
(5 plane(s) diverted to support CAP in hex.)
5 plane(s) intercepting now.
Group patrol altitude is 10000 , scrambling fighters to 10000.
Time for all group planes to reach interception is 18 minutes
8th PG/36th PS with P-39D Airacobra (1 airborne, 2 on standby, 0 scrambling)
(1 plane(s) diverted to support CAP in hex.)
1 plane(s) intercepting now.
Group patrol altitude is 10000 , scrambling fighters to 16000.
Time for all group planes to reach interception is 20 minutes
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Morning Air attack on 2/9th Field Regiment, at 31,41 (Trichinopoly)
Weather in hex: Moderate rain
Raid spotted at 23 NM, estimated altitude 23,000 feet.
Estimated time to target is 7 minutes
Japanese aircraft
Ki-48-Ib Lily x 20
Japanese aircraft losses
Ki-48-Ib Lily: 3 damaged
Allied ground losses:
Vehicles lost 3 (0 destroyed, 3 disabled)
Aircraft Attacking:
3 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
4 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
10 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
3 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
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Morning Air attack on 2/9th Field Regiment, at 31,41 (Trichinopoly)
Weather in hex: Moderate rain
Raid spotted at 10 NM, estimated altitude 25,000 feet.
Estimated time to target is 3 minutes
Japanese aircraft
Ki-48-Ib Lily x 7
Japanese aircraft losses
Ki-48-Ib Lily: 2 damaged
Aircraft Attacking:
7 x Ki-48-Ib Lily bombing from 23000 feet
Ground Attack: 4 x 100 kg GP Bomb
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Afternoon Air attack on 107th RAF Base Force, at 59,42 (Kalemyo)
Weather in hex: Partial cloud
Raid spotted at 49 NM, estimated altitude 15,000 feet.
Estimated time to target is 14 minutes
Japanese aircraft
Ki-21-IIa Sally x 19
Ki-43-Ib Oscar x 26
No Japanese losses
Allied ground losses:
14 casualties reported
Squads: 0 destroyed, 0 disabled
Non Combat: 0 destroyed, 5 disabled
Engineers: 0 destroyed, 0 disabled
Aircraft Attacking:
10 x Ki-21-IIa Sally bombing from 11000 feet
Ground Attack: 4 x 250 kg GP Bomb
9 x Ki-21-IIa Sally bombing from 11000 feet
Ground Attack: 4 x 250 kg GP Bomb
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ASW attack near Miri at 64,87
Japanese Ships
DD Tatsukaze
PB Hozugawa Maru
PB Fuji Maru #4
Allied Ships
SS Saury
SS Saury launches 4 torpedoes at DD Tatsukaze
Saury bottoming out ....
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
Escort abandons search for sub
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ASW attack near Miri at 64,87
Japanese Ships
PB Hozugawa Maru
PB Fuji Maru #4
Allied Ships
SS Snapper
SS Snapper is sighted by escort
Snapper bottoming out ....
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
PB Fuji Maru #4 fails to find sub, continues to search...
Escort abandons search for sub
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Amphibious Assault at San Jose
TF 131 troops unloading over beach at San Jose, 78,84
Japanese ground losses:
10 casualties reported
Squads: 1 destroyed, 0 disabled
Non Combat: 2 destroyed, 0 disabled
Engineers: 0 destroyed, 0 disabled
Guns lost 1 (1 destroyed, 0 disabled)
81mm Mortar lost overboard during unload of 5th Amphibious Bde /3
17 troops of a IJA Infantry Squad lost from landing craft during unload of 5th Amphibious Bde /4
10 Support troops lost overboard during unload of 5th Amphibious Bde /5
10 Support troops lost from landing craft during unload of 5th Amphibious Bde /5
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Ground combat at 29,47
Japanese Shock attack
Attacking force 659 troops, 0 guns, 101 vehicles, Assault Value = 57
Defending force 26 troops, 23 guns, 0 vehicles, Assault Value = 1
Japanese adjusted assault: 104
Allied adjusted defense: 1
Japanese assault odds: 104 to 1
Combat modifiers
Defender: leaders(+), disruption(-), supply(-)
Attacker: shock(+), leaders(+)
Japanese ground losses:
Vehicles lost 2 (0 destroyed, 2 disabled)
Allied ground losses:
24 casualties reported
Squads: 3 destroyed, 0 disabled
Non Combat: 0 destroyed, 0 disabled
Engineers: 2 destroyed, 0 disabled
Guns lost 58 (58 destroyed, 0 disabled)
Units destroyed 1
Assaulting units:
1st Tank Regiment
Defending units:
21st Australian Bde /1
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Ground combat at Malang (55,105)
Japanese Bombardment attack
Attacking force 1851 troops, 154 guns, 125 vehicles, Assault Value = 1538
Defending force 25936 troops, 269 guns, 71 vehicles, Assault Value = 661
Allied ground losses:
3 casualties reported
Squads: 0 destroyed, 0 disabled
Non Combat: 0 destroyed, 1 disabled
Engineers: 0 destroyed, 0 disabled
Vehicles lost 1 (1 destroyed, 0 disabled)
Assaulting units:
23rd Tank Regiment
9th Tank Regiment
10th Tank Regiment
48th Division
65th Brigade
3rd Tank Regiment
21st Division
2nd Tank Regiment
11th Tank Regiment
2nd Ind.Art.Mortar Battalion
9th Medium Field Artillery Regiment
14th Army
1st Medium Field Artillery Regiment
4th Medium Field Artillery Regiment
8th Medium Field Artillery Regiment
17th Medium Field Artillery Regiment
Defending units:
2nd KNIL Landstorm Battalion
1st KNIL Regiment
Batavia Coastal Gun Battalion
Tjilatjap KNIL Battalion
Marinier Battalion
3rd KNIL Landstorm Battalion
1st Regt Cavalerie
1st KNIL Landstorm Battalion
4th KNIL Regiment
Van Altena Battalion
Commandement Marine
1 ML-KNIL Aviation
Madion Base Force
ABDA
Soerabaja Base Force
3rd KNIL AA Battalion
Kalidjati Base Force
North Java Base Force
ML-KNIL
Loemafjang Base Force
MLD
Batavia Base Force
Tjilitap Base Force
Bandoeng Base Force
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Ground combat at Colombo (29,48)
Japanese Deliberate attack
Attacking force 87196 troops, 1076 guns, 583 vehicles, Assault Value = 2859
Defending force 45037 troops, 868 guns, 981 vehicles, Assault Value = 960
Japanese engineers reduce fortifications to 2
Japanese adjusted assault: 1063
Allied adjusted defense: 1701
Japanese assault odds: 1 to 2 (fort level 2)
Combat modifiers
Defender: forts(+), leaders(+), experience(-)
Attacker:
Japanese ground losses:
1977 casualties reported
Squads: 7 destroyed, 89 disabled
Non Combat: 9 destroyed, 202 disabled
Engineers: 20 destroyed, 71 disabled
Guns lost 1 (1 destroyed, 0 disabled)
Vehicles lost 5 (1 destroyed, 4 disabled)
Allied ground losses:
3553 casualties reported
Squads: 44 destroyed, 96 disabled
Non Combat: 110 destroyed, 461 disabled
Engineers: 7 destroyed, 41 disabled
Guns lost 26 (4 destroyed, 22 disabled)
Vehicles lost 175 (54 destroyed, 121 disabled)
Assaulting units:
12th Engineer Regiment
41st Infantry Regiment
112th Infantry Regiment
14th Division
33rd Division
Imperial Guards Division
5th Division
113th Infantry Regiment
148th Infantry Regiment
6th Guards Division
55th Engineer Regiment
16th Guards Regiment
3rd Medium Field Artillery Regiment
55th Mountain Gun Regiment
1st Hvy.Artillery Regiment
6th Ind.Hvy.Art. Battalion
3rd Ind.Hvy.Art. Battalion
56th Field Artillery Regiment
2nd Mortar Battalion
9th Ind.Hvy.Art. AT Gun Regiment
15th Ind.Art.Mortar Battalion
20th Ind. Mtn Gun Battalion
25th Army
1st RF Gun Battalion
10th Ind. Mountain Gun Regiment
14th Ind.Art.Mortar Battalion
18th Medium Field Artillery Regiment
1st Ind.Hvy.Art. Battalion
Tonei Hvy Gun Regiment
2nd Ind.Hvy.Art. Battalion
3rd Ind. Mountain Gun Regiment
21st Medium Field Artillery Battalion
Defending units:
25th Australian Brigade
99th Indian Brigade
21st Australian Bde /2
6th Australian Division
2/3rd MG Battalion
Colombo Fortress
18th Australian Brigade
NS KNIL Territory Regiment
98th Indian Brigade
100th Indian Brigade
23rd Indian Div /13
2nd Ceylon H AA Regiment
222 Group RAF
Addu RN Base Force
Ceylon Command
Eastern Fleet
85th British AT Gun Regiment
2/13th Field Regiment
1st RM Heavy AA Regiment
35th Light AA Regiment
808th Engineer Aviation Battalion
6th Heavy AA Regiment
1/3 Ceylon Det
22nd Light AA Regiment
RAF 222 Group Wing
23rd AA Bde
48th Light AA Regiment
IV Indian Corps /1
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Ground combat at Probolinggo (56,105)
Japanese Deliberate attack
Attacking force 1655 troops, 4 guns, 136 vehicles, Assault Value = 90
Defending force 0 troops, 0 guns, 0 vehicles, Assault Value = 0
Japanese adjusted assault: 70
Allied adjusted defense: 1
Japanese assault odds: 70 to 1 (fort level 0)
Japanese forces CAPTURE Probolinggo !!!
Combat modifiers
Attacker:
Assaulting units:
1st Recon Regiment
4th Tank Regiment
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Ground combat at 49,101
Japanese Deliberate attack
Attacking force 3657 troops, 40 guns, 0 vehicles, Assault Value = 119
Defending force 1266 troops, 86 guns, 0 vehicles, Assault Value = 3
Japanese adjusted assault: 87
Allied adjusted defense: 7
Japanese assault odds: 12 to 1
Combat modifiers
Defender: terrain(+), leaders(-), disruption(-), fatigue(-)
experience(-), supply(-)
Attacker:
Japanese ground losses:
19 casualties reported
Squads: 0 destroyed, 2 disabled
Non Combat: 0 destroyed, 0 disabled
Engineers: 0 destroyed, 0 disabled
Allied ground losses:
89 casualties reported
Squads: 8 destroyed, 0 disabled
Non Combat: 3 destroyed, 3 disabled
Engineers: 0 destroyed, 0 disabled
Assaulting units:
20th Infantry Regiment
Defending units:
2nd KNIL Regiment
KNIL Army Command
1st KNIL AA Battalion
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Ground combat at Nias (42,79)
Japanese Shock attack
Attacking force 76 troops, 1 guns, 0 vehicles, Assault Value = 5
Defending force 0 troops, 0 guns, 0 vehicles, Assault Value = 0
Japanese adjusted assault: 6
Allied adjusted defense: 1
Japanese assault odds: 6 to 1 (fort level 0)
Japanese forces CAPTURE Nias !!!
Combat modifiers
Attacker: shock(+), leaders(-)
Assaulting units:
2nd Raiding Rgt /2
RE: Colombo Falls
Posted: Fri Feb 19, 2010 8:37 am
by modrow
Andy Mac,
thanks for the info provided so far. Still, I want to know some more details [8D]
ORIGINAL: Andy Mac
In a one off fight you might be right but in a long drawn out siege or killing fight like this a Div stands up better
Losing 10 Squads out a Div means the Div is at 97%
Losing 10 Squads out of a Bn means its at 67%
Smaller units suffer more.
You need Divs for big fights
Bdes at a pinch will do but Bns are a waste of space.
e.g. 6th Aus Div was at AV 360 the turn before Ceylon fell
34th Indian Div (made up of 98th 99th and 100th Indian Bdes) had about 170 AV
Its a big difference
Interesting comment. If confronted with this type of difference, I would have *intuitively assumed* (without knowing) the difference here may be the experience of the respective units (the Australians are more seasoned at that point of time, are they not ?). Which would make sense, because the low exp units seem to be easily caught in a bad downward spiral that I frequently see and may actually be a reason why the long sieges of Singapore and Manila known from the past do no longer seem to occur (high[er] number of disabled squads/devices after the first attack, leading to high losses due to destruction in the next attack and replenishment of the disabled pool etc).
Your statement seems to imply that the %age of losses/disablements taken influences the combat power of a given unit beyond the removal of the assets. So it's not just the number of available squads (times the corresponding modifiers like exp etc ?) ?
Or is the effect behind your statement that the higher %age of losses taken will affect disruption/fatigue/morale more seriously and thus reduce the effective combat power more significantly ?
In other words, are 400 AV consisting of 10 100AV units with 40 AV remaining combat power each are going to do worse in ground combat than a single 400 AV divisison with 100% of its TOC ready to use, assuming that exp, morale, fatigue, disruption and commander's skills are all equal ?
Or is the difference in the result rather due to the fact that those run-down 40AV units just won't have as good a morale/fatigue/disruption value as the fresh division ?
Sorry that I am that inquisitive [;)], it's just a topic I am very interested in...
Hartwig