I see a lot of folks talking about the big, epic sacrifices—the hero dying for the cause, the world being saved. But what really gets me invested are the smaller, personal contradictions. Take a character who believes fiercely in the 'good' side's morality, but then has to carry out an order that feels utterly evil, like sacrificing a village to slow the enemy's advance. The stake isn't just winning or losing the war; it's whether they can live with themselves afterward, whether their soul survives intact even if their body does.
Some of the best handling I've seen is in books where the 'evil' isn't a cartoonish force but a seductive ideology. The emotional stake becomes the hero's fear that they might be convinced, that the 'evil' offers a solution that's brutally efficient where 'good' is messy and flawed. That internal tug-of-war, the fear of becoming what you fight, that's where the real tension lies. It's less about the fate of kingdoms and more about the fate of a single conscience.
I just finished a series where the protagonist had to ally with a former enemy to stop a greater threat, and watching her grapple with trusting someone she'd been taught to hate was more compelling than any battle scene. The war was the backdrop, but the emotional battlefield was inside her.