Force Lord wrote:Let's assume that Hitler does not halt his forces and allows them to wipe out the BEF before it can evacuate from Dunkirk. How effective will the British Army be after losing completely their best-trained troops in the Continent?
What makes you think the German Army will win that particular battle? The terms "German Army fights" and "German Army wins" are not synonymous. For your information, the allies were not just sitting on the beach with their thumbs up their ass waiting to be overrun.
As it happens there were very good reasons why the German Army stopped when it did. They had outrun their supply lines, their armored formations were out of fuel and all their units were running low on ammunition. They'd also outrun their command and control system and that alone made it very hard for them to launch coordinated offensives. The Germans needed to stop for a few days to regroup and resupply. The three-day halt in the German advance was inevitable, either a halt was ordered or it would happen without orders.
Another factor involved is that the ground was extremely bad for an assault and very good for the defense; you know there was a reason why the British decided to fall back on that particular point. Gort didn't just throw a dart at a map and say "we'll retreat there," The ground around Dunkirk was marshy, saturated and was transversed by a large and very obstrictive canal that provided a ready-made moat. In short, the British were in an excellent defensive position and that fact was not an accident. It should be noted that at the Battle of Wytschaete, a German assault was repelled quite convincingly. There is a key fact here that needs to be remembered. All the roads leading to the battle front in question (the Dunkirk Perimeter) pass over a single bridge at Poperinge. That supply bottleneck was a major problem for anybody launching any military operations in the area. This hurt the Brits while they were fighting one way and it hurt the Germans when they were fighting the other. Oh, by the way, the weather over Dunkirk between May 29 and May 31 was atrocious and prevented most flying missions so the Germans didn't have any air support.
Now, we have another factor coming in. The British had fallen back on their tail. that means they had fallen back on their artillery and the Dunkirk Pocket was thick with the stuff. Not just normal field artillery but all sorts of good things - like, as Mark mentioned, 3.7 inch anti-aircraft guns. Guess where they were? Not deep inside the pocket but dug in as anti-tank guns on the Dunkirk Perimeter. That perimeter was thick with anti-tank. A two pounder might have been a joke in 1942 but in may 1940 it will stop any tank in German service. What a 3.7 inch would do is gruesome to imagine (and yes, 3.7 inch anti-aircraft crews were trained to engage tanks). Those guns also had plenty of ammunition and their crews knew they would be leaving them behind. So, there was no sense of any need to conserve ammunition. Oh, by the way, the Royal Navy was offshore anyway, evacuating troops. Can anybody say "Naval Gunfire Support".
So, let us assume that the German high command has a fit of collective insanity (not an unknown event see: Russian Front, strategy or lack thereof) and decides to launch an armored offensive right away against the Dunkirk Perimeter. The tanks swarm in, what there are of them that are still operational. A quick peruse suggests that the German armored units were down to 20 - 30 percent of their theoretical strength. The tanks are low on fuel and ammunition. They run head-on into a heavy defense and face the canal. They have no bridging gear (it's stuck on the road somewhere between Aachen and Poperinge with the emphasis on the former) and come to a halt while the tanks get shot up by the British defenses. Every so often one of said German tanks leaps into the air and flies 40 feet backwards when a military genius with a 3.7 inch gun
takes a pot-shot. The German infantry try to advance and penetrate but get shot up and hammered by artillery fire (the Germans repeatedly tried to break through the Dunkirk Perimeter and more or less failed). German casualties mount steadily with no corresponding gain. Meanwhile, back on the beaches the evacuation continues.
So, any reaonable assessment of the situation suggests that an offensive by the Germans will not be a complete wipe-out of the Allied forces (BEF and French) but an incremental change and one that does not inflict that many additional casualties on the Allies while inflicting a lot more on the Germans. By the way, you might also note that the rearguard for the evacuation wasn't British, it was French so any accelerated advance by the Germans would bag more Frenchmen, not British. (It was actually planned for the rearguard to be British but it just didn't work out that way.)
What effect does this have? On the British, very little. As we have seen, even had the Germans launched an immediate assault on the Dunkirk pocket, most of the BEF would still have got off. They would have left their heavy equipment (which they did anyway) but more was waiting for them the other side of the channel. mark's story about my father is quite correct, he and his troop left the beach, arrived in Dover where there was a complete battery set of 3.7 inch anti-aircraft guns waiting for him along with a set of orders to take his guns, proceed to St John's Wood and join the London AA defenses. They were mightly pissed by this since everybody else got one or two weeks "survivors leave". Note that, the British sent the recovered troops off on leave. They wouldn't have done that if they had really felt there was any serious threat to the UK. So, the result is that, at worst, the British have a samller (but still significant) cadre for their later Army.
The effects on the Germans are much more interesting. Throwing their ill-supplied and ill-maintained armor in a battle on lousy ground against prepared defenses on the Dunkirk perimeter will cost them a lot, probably most of that armor. In @ that armor spent its time refitting and resupplying and was ready for the second-phase assault on France. In this timeline that armor doesn't get refitted and resupplied, it gets destroyed. This has an immediate and appreciable impact on the second-phase assault. In @ the refitted armored formations were the German reserve and they were decisive in the assault. The French had no reserves and they collapsed. But, in this timeline things are different, Neither side has any reserves and the Germans are pretty mcuh leg infantry only. If they delay enough to rebuild and refit their armored units (which will take much longer than it did in @ due to the carnage on the Dunkirk Perimeter) the French get a chance to catch their breaths and reorganize as well. It's quite possible the British will re-insert their troops (or send fresh ones - by this time there were quite an appreciable force of those) and provide the much-needed Allied reserve. FYI the second BEF was already in France and forming up when France surrendered. Also, everybody has seen how the Germans played the game now and they know the rules (in more senses than one, the atrocities committed by the Germans during the battle for Northern France including the massacre at Le Paradis and the brutalization of allied PoWs from Dunkirk - the Bataan Death March gets all the publicity but the Germans treated the Dunkirk PoWs just as badly - are likely to have stiffened resolve.
Would those changes be enough to keep France in the war? They might just have been. In that case, we see WW1 recreating itself, oddly along almost exactly the same line as twenty five years earlier. If not, well, no difference there then.
Added to this is the pschological effects. Assuming that fewer troops from the BEF got off at the cost of severe dislocation of the German offensive against France, the first thing that will happen is that the British change propaganda gear. It won't be "we saved our army" but "our army heroically bought time for the French to get their act together". The French saw Dunkirk as "The Rosbifs cut and ran". They might now see it as "The Rosbifs died to buy us time" and that might also contribute to them holding on. The Germans, wandering around the blown up and burned out tanks stuck in the mud in front of the Dunkirk Perimeter think "Gee this blitzkrieg stuff is all crap. Perhaps we better have a rethink."
All this talk about "crushing the BEF At Dunkirk" is neo-nazi apologia. The truth is that there were very good reasons why the German Army did not carry out an armored assault on the perimeter. The operational reasons we have covered. The strategic reason is simple. The strategic center of mass for the Allies was the French Army, not the British. It was France and the French Army that were the primary strategic objective, the British were a sideshow. The German generals kept their eyes on the strategic ball and concentrated their efforts on their primary strategic target. As was perfectly right and proper. Diverting effort from the primary strategic objective to a secondary one and by doing so compromising the thrust against that priamry objective is a classical and fatal strategic error (one that, by the way, Germany made over and over again, especially in Russia. Guess what, those disastrous errors on the Russian Front were made by those same Generals who condemned the failure to use armor against the Dunkirk Perimeter. Guess they never did learn.)