"Didn't fight in the was" Alliance broken

[Ca7cher]

i'm not sure if this is a bug or a feature, or if I am just missing something here. Therefore I won't be posting this to the bug reports. Please just consider this to be a general rant.

I was playing as King Tassilo III of Bavaria, with the 769 start. I marries my only son and heir to a bastard daughter or King Karl of West Francia, and proceeded to form an alliance with him -- to stop him from pressing his claim on my kingdom. So far, so good.

3 separate revolts break in his Kingdom almost immediately, and Saxony decides to attack him as well.
As my kingdom is very small, I only have around thousand soldiers but I scrape up what I can. I link my men into one of his levies and leave it be while I am sorting out politics with my vassals.

Then, in 778, King Karl of West Francia breaks our alliance as I didn't fight in his war?!

I has war scores of 10%, 1% and 99% (!), but 0% in one of them. I suppose it's my own fault, but still. What the hell? Fun thing is that by troops were IN A BATTLE when this happened.

Naturally after I lost the alliance, I got invaded by the pagan in east.
It wouldn't be so annoying but it being an ironman game I'm slightly furious.

 

[raven63]

That's a pretty interesting situation. On one hand, you want to have a mechanic to prevent the player from forming alliances and maintaining them by accepting calls to wars without ever actually fighting (The AI does not use this dirty strategy). On the other hand, it's not obvious how to judge whether a player is doing this, or just happens to be in a situation like yours.

I wonder if it could be done time-wise, as opposed to war-wise, so to speak. War-wise would be how it's implemented now, i.e. the game checks the ally's contribution in all wars, and the event fires if one of them is zero. Time-wise would be the game checking for the allies TOTAL contributions (i.e. the sum of its contributions in all active wars) over time. If the contribution is zero for a a certain length of time, the event fires.