In Israel - to simplify somewhat* - everyone is conscripted against their will, for 2.5 years (and no pay). They are then given a choice. They can volunteer for combat service, risk dying more, and be lauded as heroes. Or they can opt for non-combat service, like auto mechanics, clerks, etc., and be generally shamed by society.

Would you call those who volunteer heroes, or slaves? Or both?

*This is quite simplified. Men are conscripted for 3 years, women for 2. Ultra-Orthodox Jews, and Arabs, and non-able-bodied persons, are not conscripted at all. Large segments of society which oppose govt. military policies also tend to assign the same moral blame to volunteer combat soldiers, and consider them villains not heroes. Actual posts differ widely in desirability, and family connections are a major factor in assignments. Other caveats apply.