Chaosmancer
Legend
Not every Fighter is a guard or militia, and not every guard or soldier is a Fighter, but certainly quite a number of them are as their background before adventuring begins. Its part of the class fantasy, just being an average guy who learns to use weapons and pushes themselves down that path.
And part of the class fantasy of the Wizard is that they were just the average girl who learned to light things on fire from reading books and pushed themselves down that path.
And part of the class fantasy of Monks is that they were just the average person who learned how to punch good and pushes themselves down that path.
But Fighter's are stuck being "mundane" and unable to break free while Wizards and Monks are free to do crazy stuff like teleport or shoot lazers. And that is while Fighter's only have about 4 subclasses that are ACTUALLY mundane.