What you did was more like a flying wedge by the way. Spearheads work in a way that... Let's say you have 2 times the strength of the enemy, but he is entrenched along a frontline, in forts. That is obviously not enough to defeat them, and they may choose to turtle up to beat you economically in the long term. To counter this, you put a frontline right along theirs, with infantrymen (in RON terms obviously). Then you have a 1 : 1 ratio on the front, meaning if your enemy chooses to attack, he's in the same spot as you are, so they mostly won't do that. Now amidst the confusion, you use the other 50% of your forces, which may as well be tanks, and strike at a single point of the front. At this point, your enemy is forced to reposition their entrenched troops. You have multiple options after this trick, you can set all your troops to auto capture, or entrench your tanks and move forward with your infantrymen to slowly chop away the land. It's up to you. Either way, this is how you play armored spearhead in RON, and it is much more similar tactically to what it is irl.
I want to use a similar strategy, it's called the "Peachsturm", and it's based on when an attack like that one tries to penetrate me, I put my troops in two big cheeks and grab it smoothly, therefore getting myself a flanking bonus and destroying his stick!
I would say the success rate for bombers is about 70% percent depending on if A you have enough bombers and B if and how much anti aircraft guns the enemy has for blitz Krieg I would say the success rate is 80% because if your sending all your units in a weak area if a powerful army is sent to halt your force than if the enemy has another force they can easily just counter invade and for island blitz krieg I mean warships that’s all I need to say on how a blitz krieg towards an island can fail
surround the capital with tanks then the enemy will go for on of them now u have distracted the enemy u can go for the capital or u can send troops for conquer and tanks to take over the enemy