I agree with this part. I think it is valid to have some amount of negative effects from wars going bad.
The reason and consequences would vary, for example one aspect is the monetary cost of war, the supply avaibility, the casualities, the time and distance, the war justification, the objetives, your kind of society, etc.
But the real work is to depure all those concepts into a set of rules that are meaningfull, ballanced, simple, informative and manageable. Social collapse from bad going wars should be a worse scenario not the rule.