Combat reductions not calculating properly?

[FatsXL]

My attacking army had 18 chaos and 2 fear with a catapult against a city stack with no army bonuses or negations except for +10 wall. The wall should've been negated and all armies reduced by 20 but instead they were reduced by 15.

It's not in my battle records anymore but the game id is 31046

[KGB]

FatsXL,

The maximum negative bonus from Fear+Chaos is capped at -15. Positive bonus's are capped at +30.

KGB

[TheVic]

Yes, I can understand that the cap should be different, but -15 is strangely low as DK can have larger value.
+30 / -25 would be better. Fear has always been penalized quite a lot.

[FatsXL]

ok so to clarify does this mean an army can only drop a maximum 15 points below their true str value, or that a maximum 15 fear/chaos can affect them?

In other words in a battle with 5 morale vs. 20 combined fear/chaos, would the entire 20 apply (dropping str to 15 below its true value), or would only 15 apply (dropping to 10 below)?

[piranha]

It means that you can only apply 15 negative (only counting fear and chaos). But lets say you have a dreadknight and you have -18 and your enemy have a archon doing 6 negate hero then you would fight with 18 - 6 = 12 chaos so it can be useful to go higher than 15 in chaos.

[KGB]

FatsXL,

In other words in a battle with 5 morale vs. 20 combined fear/chaos, would the entire 20 apply (dropping str to 15 below its true value), or would only 15 apply (dropping to 10 below)?

Yes.

KGB

[FatsXL]

That was an if or question so these answers didn't clarify the situation, however I think I've figured it out on my own. In one of my recent battles an opposing army had +5 wall but my full -18 chaos took effect, excepting a sandworm unit which doesn't benefit from walls and only had -15. This suggests a unit can't go below 15 it's normal value but as long as it is equal to or above that all chaos and fear deductions will take effect.