What is Considered a Non-fighter in Each of the 4 Madhabs' Mutamads?

As the title says, what is considered a non-fighter in each of the 4 madhabs? Is it restricted to only woman and children, or is the status extended to other categories like the elderly, monks, and laborers? I understand that there have been a couple posts similar to this, however unlike those posts, I am specifically looking for a comprehensive explanation of what each of the 4 madhabs' mutamads relay regarding this topic.