Do you really believe that?Yes, some little changes could have changed a lot. If you allow French to get 1-2 more days Germans will have a hard time as they will face exactly what French wanted: a prepared defense and even with planes it's going to be really hard.
It's really easy to stop the Germans. OTL everyone expected the Germans to lose. The Wallies had way better armies on paper, and much better resources to draw on in a prolonged conflict.
If they don't make such massive strategic blunders then the Germans would probably get holed up at some point in the campaign. Superior German doctrine probably will allow for some advances, but the sheer weight of material would slow it down to more WWI type warfare. At that point the allies win because they have staying power. Even if the German army doesn't assassinate Hitler (something they might do if the west goes badly) Germany will starve quickly.
Colonel Charles de Gaulle, in command of France's hastily formed 4th DCR, attempted to launch an attack from the south at Montcornet where Guderian had his Korps headquarters and the 1st Panzer Division had its rear service areas. During the Battle of Montcornet Germans hastily improvised a defence while Guderian rushed up the 10th Panzer Division to threaten De Gaulle's flank. This flank pressure and attacks by the Luftwaffe 's VIII Fliegerkorps broke up the attack. French losses on 17 May were 32 tanks and armoured vehicles, but had "inflicted loss on the Germans".[158] On 19 May, after receiving reinforcements, De Gaulle made another effort, and was repulsed with the loss of 80 of 155 vehicles.[159] von Richthofen's VIII Fliegerkorps had done most of the work; by targeting French units moving into position to attack the vulnerable German flanks it was able to stop most counterattacks from starting. The defeat of de Gaulle's unit and the disintegration of the French 9th Army was caused mainly by Richthofen's air units.[160]
I read Liddell-Hart's' History of the Second World War that someone in the French Army wanted to chop some of the trees down in the Ardennes Forest and use them as road blocks. He said that blocking the roads would have slowed down the German advance considerably. However, the French officer was overruled because it would stop a counter attack by the French cavalry, which was brushed aside by the Germans.
one year? That's weird, they had 5 months and they know that. The lacked ammo and oil for more. It was a pass/fail game.
The single most critical event is the 2nd rade 55th division at Sedan. You change that or you give them two more days, or you move the French 7th army where it should have been and it's game over for germans: as long as French can hold the river and at least prevent germans for building a bridge, Ardennes are a dead end for them.
Save that you're wrong: they hold fixed positions in late may and june (the Weigand line) and understood that a hedgehog defense was effective. They just lacked men to get the right hedgehog density.
As a matter of fact, German planes were not really effective against entrenched infantry (well, none were). You have numerous examples of that. Think for example about Tobrouk or Bir Hakeim. I select them as there were no cover!
If fully agree with you save for one think: the LW can try to interdict or to hammer front lines but not both at the same time. It was not equipped for low-level interdiction (you would need jabo for that) nor trained for that.
They could have attacked train lines (probably the best choice) but as always they would have become predictable and easier targets (allowing fixed AA to act). At the same time they would have needed bombers in Sedan. Hard choice and not that obvious.
Eh, this was done in Norway and the German 75mm howitzer on the Pz IV blew them completely apart; it wouldn't have been all that much of an obstacle if not properly supported; even when they were in Norway German armored columns just blew through them.
Each shell used to clear a tree trunk is one less to use against Frenchmen later.
Any delay allows the slow French Command Loop to catch up, thats what lost battles for them.
Hs123 and Ju87 were used for just that and were highly successful at it and breaking the defenses at Sedan:
The key reason French reserves were never able to properly form up was because they did not exist. Pretty much the entire French Army had moved into northern Belgium to counter the German thrust there.in fact that was a key reason French reserves were never able to properly form up, because they were getting shot up on trains and on the march from May onward