A fort without a military? There are enough trap-avoiding monsters out there that I can't imagine not having serious trouble that way. Setting up squads and getting them to train is fairly easy- I just use Therapist to sort of who belongs on which squad, and it does involve a lot of flipping between windows when you're setting them up but barring heavy casualties you shouldn't have to bother with it very often.
Even though I use batteries of traps myself I still keep at least 2 squads running combat drills all the time- and once I get overpopulated, set up a suicide squad of scrubs as my first responders... sure a lot of them die but the ones that make it train up and earn a place on one of the regular squads. It seems like a much more noble way to die than being thrown into magma like some kind of cat.
1st squad: My primary heavy hitters, forgotten beast killers, selected for their highest combat skills but culling high-level laborers like miners and smiths
2nd squad: the backup squad, not often activated but kept training, the useful laborers who just happen to be good soldiers
3rd squad: the scrubs, peasants and cheesemakers, throw them at a seige when you want to thin the herd a bit
Going into such detail here because I kind of doubt a program like this is soon in coming- as confusing as it can be once you figure it out (the wiki is actually pretty helpful on this front, which is more than I can say about other areas), the military screen does work, marksdwarves being the notable exception. I still just avoid them.