Oh ok, thanks for the reply. So how many new recruits do you think I should get ever season, or year? I guess I should say what is a big enough army when you have 200 dwarves or so?
Every dwarf with nothing better to do should be trained in the arts of war and death. Every dwarf you can spare should be sent against the green-skinned foes.
Ideally, your walls of flesh, mail, and blades will be supplemented by stoney traps releasing cages and disks to capture and slay more enemies tirelessly, endlessly, as well as more complicated traps which can slay a regiment of goblins and their mounts, and probably any dwarves foolhardy or unlucky enough to get caught in the blast.
Above all, remember three words:
Losing. Is. Fun.