In terms of tactics, perhaps the most important one for modern warfare is on infantry tactics the Germans developed in the latter half of WW1.
2. Infantry assault: They relied on shorter but more intense artillery bombardment, followed by well-equipped infantry and engineer. Their job was to disrupt enemy's line and bypass strongpoints; follow-up troops were responsible for reducing strongpoints.
3. WW2: The basis of infantry tactics were already developed by the end of WW1. So, add on refinements in WW2: a) Light machine gun -- the most infamous example would be MG-42, but what made it particularly lethal was its high rate of fire and its barrel was easily replaced; b) Motorized infantry -- they made sure to have their tanks supported by motorized infantry, engineers and artillery; c) Small unit leadership: They paid attention to the training of their NCOs and junior officers, which then allowed them to issue mission-oriented combat orders (you are given objectives, but it is up to you and your subordinates to figure out how to go about), making them tactically more flexible than most of their opponents.
While your observations aren't completely inaccurate, they're not entirely correct either and you're operating under some common misconceptions. The Germans
aren't the inventors of many of the aspects of modern warfare that they're credited with, although they did develop some of the concepts others came up with to great effect.
2. Infantry Assault - British commanders had by 1917 developed methods for pre-registration and precise formulas for artillery taskings down to how many guns per length of trench, with what type of ammunition, for what purpose (eg Counter-Battery or Rolling Barrage for supporting Infantry).
Indeed it was at Cambrai that the Germans first experimented with the stormtrooper tactics you refer to which were used to great effect by them in 1918, when they counterattacked after Byng's initial gains after the first 3-4 days at Cambrai. The British had also introduced Infantry tactics to complement the advances in Artillery use by 1917 also. That these tactics weren't as effective as they may have been in 1917 is due to the fact that German manpower had yet to be exhausted, and defence in depth limited British gains to "Bite and Hold".
These same infantry tactics, coordinated properly with Artillery, Tanks and air in 1918 were responsible for the spectacular successes the Allies had in the Fall of 1918. To say that the Germans invented these tactics by themselves just isn't true. If anyone created combined arms in WW1 it wasn't the Germans, it was men like J.F.C. Fuller, John Monash, Herbert Plumer, Arthur Currie and Henry Rawlinson. The Germans just took it to the next level and
learned from those successes, whereas the British post WW1 did not.
3. a) Light Machine Guns were again, not a WW2 Invention. Indeed the British Lewis Gun is considered a "War Winning" piece of kit by many historians. Many 'British' formations, notably the Dominion levies, were using Lewis Guns at a deployment rate of one per section by the War's end. You're dead right about the MG42 being one of WW2's most effective machine guns though, unarguably so in terms of cyclical rate of fire. And the Germans did develop platoon firepower to the point where they invented the Assault Rifle - which was a
massive innovation.
3. b) Motorised Infantry - The Germans weren't the kings of Motorised Warfare because of the number of vehicles employed. All armies in this war used Motorised Infantry to some degree. The US for example fielded the most mechanised and motorised force ever assembled on the Earth to date during that war. Indeed much of the German Army relied on Horse-drawn transport and logistics, throughout the entire war. Where the Germans excelled in Motorised Warfare was their doctrine, and even then it wasn't that they made sure their tanks were supported. All armies did that. What all armies did not do, especially at WW2's commencement was develop a doctrine wherein their supported tank units were deployed en masse. The British for example supported their tanks, but they dispersed their armoured units rather than concentrating them.
3c) I don't even know where to start with this one. To claim that ONLY the Germans trained their NCOs to lead large formations in the event of loss of Officers is literally ridiculous, ie a statement worthy of ridicule. Whilst the UK's armies suffered the most from a system where leadership came from a particular social class, this rarely stopped British units from operating without officers. If it only partially or occasionally affected the British or Indian armies, it
never affected Canadian, New Zealander or Australian formations which had exactly the same traditions of training NCOs that you claim the Germans owned and propogated. History doesn't record that it affected the US forces much either. Indeed, the US Marine Corps is a spectacular example of NCO training and leadership. I can't comment on Soviet forces, except to say that their post-war doctrine indicates that battlefield actions are micromanaged from a senior army level all the way down. As they had a step by step doctrine for everything, in the event of a loss of all officers, an NCO would likely still know what drill or type of attack was required, because it was written in a field manual. Indeed, this Soviet response to doctrine which robbed field commanders of initiative has been widely covered in post-war fictional and non fictional literature.
You're operating on some real myths about 20th century German military superiority. They were good, but they weren't that good.
