EDIT: As I screwed up the formatting due to not having had signed in, here again:
Basically what the title says.
I completed the battle with a decisive victory, cage-captured one of their heroes and upon finishing the post battle loading screen for the campaign map the game immediately crashed to desktop without any error messages/bugsplat or anything. Basically it just instantly closed in sub 1 second.
I have no mods installed but all DLC from WH1 and WH 2
Reproduction Steps: complete the quest battle with the abovementioned victory results