Mass-designating invaders and hostiles to be killed

[atleastonemoremod]

Would it be possible to create a feature where one can assign squads to mass-kill all invaders and hostiles on the map?

[Bumber64]

Probably possible. The notifications feature does a decent job of identifying hostiles, and what's reachable. You'd want some way to control which squads are allowed to engage them, possibly using schedules.

Fliers and climbers are a bit annoying, though. Kill orders don't work well on them. You have to get marksdwarves to station near them. I guess you could check if the ground below the target is reachable and send them there.