Operation Sea Lion (1974 Sandhurst Wargame)

Michele's 'A Better Show' goes into this.

Briefly, the loss of the barges and much of the Luftwaffe puts a notable dent in German industrial production, which means they dont have quite enough Panzers for a June 1941 Barbarossa.

So Sealion can prevent Germany from committing suicide in Russia. Point - Sealion.

The loss of the FJs mean the Allies keep Crete, which allows much easier bombing of Ploesti.

The bottleneck in paratroop ops was in transport aircraft, not soldiers. A paratrooper is just some infantry guy with extra training on jumps and assembly.
 
The losses in aircraft & air crew will be more significant. At the least they will be comparable to the BoB,. More likely larger.

There is a potiential for truly catastrophic losses in cargo shipping. Folks here have considered possible losses during the assault & follow on. But, after there is this vast array of ships and barges along the French coast, disorganized and unevenly defended. It would be worth the loss of a couple hundred more RAF aicraft and a handfull of warships if a aggressive pursuit along the French coast inflicts the loss of another 25,% on the cargo fleet. 50-60 % out of action for six month or more greatly magnifies the problem.

How did you arrive at the conclusion that LW air losses in a 3 day Channel battle would be larger than in a 4 month air campaign?

In terms of shipping losses, if the RN approaches the French coast they're walking into minefields, massive air attacks, and coastal artillery, (which can hit and sink destroyers if under 10,000 yards).
 
By "fleet", one often means warships.

No, when attacking coastal shipping, one means coastal shipping.

Have you ever considered actually reading the f* manual, i.e. in this case the German plans? You'd have discovered the convoys had to cover more than 20 miles. Many more. yes, including those heading for the closest point on the British coast.

The assembly along the French side would have been behind defensive minefields and under the cover of airpower and coastal artillery. It's when the invasion moves north and leaves that protection behind that the RN can attack.

It wouldn't be the "entire" Luftwaffe. Remember, they have to escort the trasnports carrying the paratroopers and their supplies. They have to keep attacking the RAF airbases. They have to fly continuous CAP missions over the beaches. They have to attack the British LOCs, otherwise those armored reserves you do not think existed will arrive at the beaches. And the Heer has no artillery on the beaches, so they have to fly as the flying artillery.
A tall order for the Luftwaffe.

The LW would have to escort paratroopers. For the rest of it, none of it applies in the timeframe that the invasion is in the Channel.

Sure! The problem is that it cannot be supported, protected, supplied and reinforced. So it gets smashed.

I think the difficulties the RAF and RN would experience attempting to shut off lines of communication would be very large.

Have you looked up who was the British Prime Minister at the time?

What about the guy waiting in the wings, Halifax? Not so much a last-ditcher there, right?
 
You know what? That's complete nonsense.
The RN was versed in, and practiced, accurate shore bombardment. They expected to use their shipborne spotter planes in precisely this role.
Granted the accuracy is limited by observers, but this doesn't mean they can't do it.

The RN can certainly do pattern bombardments of targets using air spotting - so could the IJN in all those threads where posters hotly argue at how useless the IJN was at fire support. But in 1940, not so much of the precision fire tank plinking that posters were posting pictures of, and, AFAIK, coordination between the RN and British army on shore fire support teams was lacking. For example, can anyone cite a single instance of any army unit on Isle of Wight did a fire direction exercise with RN warships in the summer of 1940? Was the RN even tasked with such a mission as fire support in 1940?
 
Oh come on. You can't extract any meaningful precedent from 2nd Narvik. No navy worth its salt would ever be so stupid as to bottle up half of its entire destroyer fleet in a single fjord in enemy waters. Just because the British can beat up on that inept navy doesn't mean that they could do the same to the mighty... Oh.

This is awkward.

How many minefields and coastal batteries did the KM have at Narvik?
 
I just want to say thank you to everyone here for making me laugh, Glenn the most of all, at how far people are willing to go to push a failed plan and how ridiculously said plans generally fail.

I don't think the British had a snowball's chance in Hell of holding IOW if this was airborne-seaborne assaulted in July 1940. I doubt you do either.
 
Glenn, Glenn...moving barges from the Danube, rearranging priorities etc are all helpful (sort of) but amount to trading coconuts back and forth on a desert island. Barge traffic on the Danube system carried essential traffic as well, so you rob Peter to pay Paul.

Where did you get the idea that civilian traffic on the Danube for countries other than Germany would be more important than military industrial production in Germany?
 
If the Island falls quickly, the civilians won't make it off in time. If the civilians make it off in time, the Island doesn't fall quickly. If the civilians have enough time to make it off in their entirety or even majority, they have enough time to take what they can and burn any stockpiles left.

If they don't have enough time to make it off, those stockpiles likely burn a few days or weeks into the occupation/siege/suicide pact.

You can't have the Islands fall quickly while also having enough time for the majority of civilians to escape but not enough time to take or destroy their stockpiles.

My guess would be that about the first time an "R" Class battleship drops 400 x 15" HE rounds on Ventor and killed 300 British civilians, that the rest of the British civilians on IOW are leaving for Portsmouth on anything that will float, and the Germans will not stop them. When they got to Portsmouth, they would ask why Churchill ordered such a bombardment? Cabinet crisis?

In terms of civilians burning their own equipment and supplies, that generally wasn't a thing civilians did - you're just inventing arguments to cover for the fact that you didn't think to realise that a rich and well stocked island of 100,000 people was not quite the Kakoda Trail.
 
How will a single regiment of light infantry stop a British division from eating it alive with extensive RAF and RN support in a matter of hours?

The defenses of IOW in July 1940 were regimental or brigade in scale, and the were poor troops. An invasion would be of the scale of 30,000 in a day. There's no chance the defenders would hold. In terms of onshore, the Portsmouth garrison, (8,000) was available to send some reinforcements, but protecting Portsmouth was its primary task. The 4th division was covering the coast in this sector, but it was spread out over 30 miles - it might send a battalion or a regiment within 12 to 24 hours of the start of the attack. Meanwhile, the local garrison has surrendered and there are over 15,000 enemy troops on IOW. I don't think the British were likely to win the Battle of Isle of Wight in the landing phase. Could they win the SLOC phase? Maybe. But the landing phase? No.
 
Glenn:
1. In September, 1940 Austria (which the Danube runs through - hence "Die Blau Donau Waltz") is PART of Germany so Danube traffic serves that part of Germany. Likewise the Danube services parts of Czechoslovakia, and the industries of this "protectorate" are vital.
2. In September, 1940 Hungary and Romania, while friendly to Germany are NEUTRAL powers, as is Yugoslavia which is more on the fence. In any case, the Danube shipping is essential for these countries and a significant proportion of the barge traffic is on vessels owned/controlled by these countries. Are you suggesting that Germany seize these barges from neutral countries? This would piss them off and hurt their economies and they would resist this. Don't forget that Germany gets a huge percentage of oil from Romania, and it has to pass through Hungary to get to Germany (Polish rail lines can't handle much extra traffic. Some may come on barges owned by Romania up the Rhine.
3. Connections between the Danube and the main German river systems are limited in 1940, and some barges simply won't fit in those locks.

Bottom line is that while you MAY get some barges from the Danube system, the overwhelming majority of losses will need to be BUILT. To the extent that barge traffic on the Danube is reduced by this, industries in Austria and Czechoslovakia will be impacted. If you attempt to seize neutral shipping, especially after SEALION v1.0 flops, forget making allies/co-belligerents of these countries.
 
The defenses of IOW in July 1940 were regimental or brigade in scale, and the were poor troops. An invasion would be of the scale of 30,000 in a day. There's no chance the defenders would hold. In terms of onshore, the Portsmouth garrison, (8,000) was available to send some reinforcements, but protecting Portsmouth was its primary task. The 4th division was covering the coast in this sector, but it was spread out over 30 miles - it might send a battalion or a regiment within 12 to 24 hours of the start of the attack. Meanwhile, the local garrison has surrendered and there are over 15,000 enemy troops on IOW. I don't think the British were likely to win the Battle of Isle of Wight in the landing phase. Could they win the SLOC phase? Maybe. But the landing phase? No.

Ok, where are the Germans getting all these paratroopers. Scraping together the Fallschrimjager units you might be able to get a single regiment ready for an immediate drop. 30,000 is as usual, you just talking out of your ass. Are the Germans dropping untrained infantry given a parachute and then thrown out of a plane? That's a damn good way to break a LOT of ankles.
 
So the distance from Calais to the isle of wight is about 138 miles. With those speedy barges going all out 6 knots which is about 7 mph, that's a good 19 hours of sailing, through the channel. It cant all be at night, the Brits will notice and attack.

From cherbourg it's a better 108 miles which still requires 15 or so hours of sailing. So it cant all be at night.

All of this of course is without form up times, not factoring in currents or other issues that may occur.

I fail to see how Wightlion is going to do anything but get what's left of the KM slaughtered along with the barge forge, leaving nothing for the "real" invasion. It's a completely idiotic plan given the disparity of naval forces available.

I mean I get it, Lionistas want to completely disregard the RN or the RAF. It's hard not to understand why, because if they acknowledge that the Germans weren't able to defeat, cripple, or drive away either force then their fantasies of Invasion UK are completely destroyed. But it is as best dishonest.
 
Portsmouth was 4th or 5th most bombed city in the UK (I'll have to double check but it was definitely pretty high on that unfortunate chart as it was fairly easy to reach compared to say Birmingham or Liverpool) - part of my history GCSE was based on the Blitz of Portsmouth and one thing that stands out is that the number of houses destroyed exceeds the number of houses in Portsmouth - meaning that rebuilt houses were bombed again!

The airbase network in northern France was probably not suitable in the period June 15-July 15 for the type of softening up required to remove the RN from Portsmouth prior to an assault on IOW. Nor could all bombing missions be made against one port target. But, from bases in Belgium and Germany, using radio navigational aids and attacking at night, it would require thousands of bombing sorties concentrated on the naval dockyards and piers for a matter of weeks. To assault IOW by airborne, Portsmouth had to be largely neutralised by LW attacks first. Since the Battle of France was over, the entire OOB of the Luftwaffe twin engine level bombing forces were available for such a mission, less the HE-111's that had to be used for airborne transport.
 
would be interesting to watch all those seaworthy river barges towed across from france(nearest point is cherbourg at 70 miles away)at 3 knots then try to land(on what beach?) on the south shore of the isle of wight.Hint:check the currents in and around the solent.the parrallel the shoreline and move at up to three knots.
 
For me Sealion is this conversation,

A: Barbarossa was stupid. They should have tried Sealion.
B: Sealion probably fails.
A: Still, worth the risk.
B: Maybe. Who knows.


For you, Sealion is this conversation,

A: Barbarossa was stupid. They should have tried Sealion.
B: HOW DARE YOU???!@?!?!
A: The risk wa....
B: ALERT!! EVERYONE! ALERT! THERE IS SOMEONE ON THE INTERNET THAT THINKS SEALION SHOULD HAVE BEEN TRIED! THIS MUST NOT BE! SEANAYERS, ASSEMBLE!

That is very very unfair. You have used as proof that Sea Lion has a chance that the LW did better over the Channel than the RAF. You then say that the LW would be attacking RN ports. When I pointed out that ports have anti-aircraft and well are over land you ignore that fact.
You are unwilling to.answer questions when asked. Use variable plans. Ignore anything that points out problems in your ideas but you act like others are being offended by someone questioning their religious dogma.
So either answer or don't but here are some questions.
1. How many Heer soldiers will be sent on Sea Lion? Of those how many do you think will land in England? And how many British soldiers will be lost defending?
2. How much losses will the Kriegsmarine take? How many losses will the RN take?
3. How many losses will the LW take? How many will the RAF take.
Now if more Jerries than Tommies die or are captured is Sea Lion a good idea? Because if you need a straight flush to win at cards folding is a better plan.
 
Glenn, I have no desire to join in the pile-on, but I want to point something out.
Post #2918 You are saying:
A: Barbarossa was stupid. They should have tried Sealion.
B: Sealion probably fails.
A: Still, worth the risk.
B: Maybe. Who knows.

Then by post 2928 you are:
I don't think the British had a snowball's chance in Hell of holding IOW if this was airborne-seaborne assaulted in July 1940. I doubt you do either.

I am aware, that you think you are talking about two different invasions. Full-on SeaLion vs. IOW SeaLion, but you really are talking about the same thing. There is a seat of the pants, flow state way that you construct an argument that feels like it has to do more with wrestling than academia.
 
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