The mechanism of destruction is different.
However in 1939/40/41 the numbers of tanks that were "shell proof" ( tank would survive a 75mm HE hit as opposed to an AP projectile) was not that great.
The lighter tanks were considered "splinter proof" (crews and vital tank parts were protected against rifle/machinegun bullets and splinters/fragments from shells/bombs). (snip)
This was the most common Polish armored vehicle
View attachment 511071
You don't need a 550 or 1100 pound bomb to destroy it. A few dozen such bombs dropped into a concentration of such vehicles will certainly disrupt any attack or defensive position but then so will a few hundred artillery shells.
The Polish Army was not known for their armor, this is well established. They were struggling to catch up from post WWI era technology and really hadn't gotten there yet. Yes Polish "tankettes" were certainly vulnerable to even medium artillery (75mm and 81mm) but they were also fairly easy to destroy using a variety of means, from grenades to anti-tank rifles and even heavy machine guns. They were certainly well within the kill envelope of the lighter tank and AT guns (37mm on down, for the most part) that the German army had available. That isn't to say that the Polish army was a total pushover- the Germans did suffer ~ 10,000 casualties during their conquest of Poland and they had Soviet help lets not forget. I wouldn't call that negligable. But the Poles had mostly infantry and lighter kit.
We also did see later in the war how good Polish soldiers were, notably in the Air War as I believe
they one of the best performing fighter squadrons in the RAF depending on how you measure such things. Not to mention their role in securing ENIGMA equipment and so on. Lets also not forget that most of the German army wasn't not fully mechanized with trucks or half-tracks, and in fact most German artillery was being moved around through horse-drawn rigs to the end of the war.
While I certainly wouldn't argue that German artillery wasn't an important part of their army, in fact I would definitely acknowledge that their artillery was good, I don't think they were unique in that respect. Yes they had different strengths and weaknesses in their artillery than say, the English, Americans and Soviets, but the latter three powers also had formidable artillery as we know from the large number of German and other Axis troops, equipment and material that they destroyed with it and the key role it played in numerous battles. For the Soviets see the isolation and destruction of the 6th Army at the end of Stalingrad.
My point was that in the early battles, as well as later on, it was in fact air assets, and specifically the Ju 87, that helped the German army solve the problem of larger and heavier allied tanks, the type that you could not easily destroy or disable with a 37mm or even 50mm AT gun, let alone with a 75mm howitzer. The Matilda, SOMUA, Char-B1, and KV-1 tanks in the early years. As I pointed out previously, if you read accounts of many of the key battles of the early years of the war, the Ju 87 was indeed the key factor at many crucial points.
Nor did that end with the Battle of Britain. As I pointed out, the Stuka was still playing a very important role in North Africa and Russia in 1942 and 1943, again as I noted, including at Kasserine Pass, as well as during many of the campaigns by Rommel against the British Commonwealth forces. The USAAF changed fighter tactics in part to better prevent German CAS missions from wreaking havoc on American armored formations and artillery parks.
Finally while it's true that even light or medium artillery can cause problems for armored units by doing things like forcing crews to button up, & knocking off radio antennas, semaphore flags or even tracks, these would not for example necessarily prevent them from destroying German tanks and armored vehicles that tried to pass through their position subsequent to an artillery strike. It was generally considered that heavy artillery, meaning 12 - 15 cm on up, was required to significantly damage medium or heavy tanks and even then it often didn't work (in part due to accuracy).
What made the Stuka somewhat unique was that it was one of very few "true" dive bombers that remained in use as a tactical support weapon for land armies through the war. The Americans and Japanese had true dive bombers for use against naval assets, where a high loss ratio was acceptable thanks to the potentially very high value of the targets - and both the D3A and SBD bombers were very important planes in their own right, the Stuka was one of the very few that was available for a land army. Many aircraft described as dive bombers in the war had limited dive angles because either they lacked dive brakes or their airframe couldn't handle the stresses of recovering from an 80-90 degree dive. As a result they were simply not as effective.
So again, somewhat grudgingly, and I know as a bit of an outlier from the consensus in this forum as usual, I would continue to assert that the Stuka was in fact an underrated aircraft, at least for the majority of the war that took place after the Battle of Britain. I have yet to see any argument that convinces me otherwise.
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