A friend asked me to pass this on.

First, he would like to thank you for the best and most detailed mod for the game.
Second, to draw attention to the same problem as in the previous and the previous versions: once broken AI does not resist, and its spine breaks at the click of a button.
I will expand on this thought: of course, initially the balance in the mod is hardcore, so that the average player loses to AI, AI is stronger and is in more favorable conditions (for example, it does NOT need to build tank/engine/artillery factories and power plants). But, if the player still breaks AI on skill, or on easy difficulty, or with cheats, then further:
1) AI keeps a bunch of troops in some wild wilderness, and not on the main territory that needs to be defended
2) Having lost some factories and divisions, AI like crazy frantically builds... planes on half of its factories, and a bunch of tanks.
Thus, it does not restore the ground army, and is not able to resist the player (and fighting with a half-corpse is not interesting).
He will not need planes if there is no ground army to hold the front.
Tanks and cars are good, of course, but they cost 10 times more than an infantry army (rifles, uniforms, light artillery, light anti-tank guns). Therefore, when the AI ​​does not have enough army for defense, it will not need tanks either. 1 tank division instead of 10 infantry divisions will not hold the front.

How the problem is solved:
1) increase the priority of protecting the main territory with a loss of 15-20%, so that having lost 15-20% of the territory, the AI ​​throws 90% of the troops to defend the metropolis.
2) increase the priority of infantry equipment (rifles, uniforms, light artillery), especially with the loss of factories and troops.
FIRST the basic infantry army up to the required limit of divisions, THEN tanks and trucks, and only THEN aircraft.