You served the military, maybe even went to war a few years ago. Or maybe you were part o paramilitary group, created to overthrown an authoritarian regime. Fact is you know how to act in combat. You know the armaments. You know the tactics. Your presence in the battlefield can mean the difference between victory and death.
Soldiers are one of the toughest classes in the game, trained to use the most effective and heavy weapons, including war vehicles and equipment. Their military knowledge helps them serve a leading role in combat also, making them valuable individuals to any adventuring party.