From: Center of the universe (Lippoldsweiler in Württemb
the readings about the "breakthrough" of the stalin line tells a different story. In the cases it was manned, it was a hard but not impossible fighting
But i agree - you need no maginotline, just for sevastopol :)
I still like the idea that you can establish a defence line in a certain deep, but no "40m deep"-Fortress. Not with the limited resources (has anybody asked how these guys build all the trenches with barb wire? Where comes the concrete?
At kursk the russians could lay a lot mines. Normally, no division has 100.000 mines for the 40miles deep defence layer...
So not the level is the biggest problem, but the depth.
One idea (can it be done?) is, that the army can give priority for certain hexes or for an area... in this area you can build a deeper defence line (as one row) with a higher fortification as 2. All other hexes can only be level 1 or 2 or zero (maybe zero or 1 to make it even harder?)
This could help to avoid "Verdun at the eastern front". The player need to define the defence line, with priority. no line can be deeper as 2 hexes (similar to the biggest fortification layer at kursk), if you use troops behind, they can do some light dig-in (say, some artillery is better prepared, but honestly, if your gun can shoot 10 miles, nobody would dig in each gun so deep with 40 miles distance to the frontline. I bet, these guns would be in cover against air attacks, but nothing else. In no army existing
You also should define what kind of defence you want. a linked static line with one,two or three reservelines as backup (better, but take longer... it starts with the first line and the last line will be finished last. Also if you want 360 Degree Defence... you give the order and the computer do the rest.
So if you plan the Eastwall, but you have only limited engineer capability, you have a big problem - cause only 20% of the hexes has more as level1-defence. But if your heroes pay you the time (or both sides do not attack), you can dig and dig, you revice barb wire, mines, concrete, building material, and and and. If these defence systems are finished, they are really ugly (level 5-7)
So you can force the enemy to fight at another place and time (like the northern sector)
Oh - in winter (frozen surface) you should only reach level 1, only heavy engineering equipment should help to avoid it. So no russian "kursk is everywere defence-line" (or german).