I was thinking about the use of atomic, bacterial and chemical warfare in the context of the canon and the game. I suppose you would also include kinetic strike weapons, but ABC warfare sounds...better than ABCK warfare

I don;t like the term WMDs or weapons of mass detruction as that term seems to me to be a soundbite from fox news

Anyway This sort of warfare, called genocidal attacks in the game I believe, is in the canon aand is a tactic in the strategic game. Genoncide for fun and profit depends on it as a tactic. In the canon it was used by and on the Rigellians, Nearly used on the Thebans and of course was used in IWS4 a lot by both sides. Most often it is a missle bombardment by ships and fighters, occasionaly by asteroid strike. It implies heavily but with not alot of detail that both the bugs and the rigillians landed troops to round up populations for extermination or (in the case of the bugs) for dinner. Biological weapons are discussed but were considered too dangerous (In death Ground talks about once, with another mention in the Shiva option).
While the rules for bombardment are fairly ok, I do think the rules for the other methods are sparce and very vague. (I don't know how it is addressed in Ultra). Nuclear bombardment oblitarates populations very nicely, but under the rules they is no penalty for immediately colonising the planet after the last missle hits. No radiation? No nuclear winter? No ecological breakdown?

Also I would like some rules on biological attacks and using asteroids. A machine race would probably always use them (no problem to them), and of course you get mad men or people who very pragmatic let us say.
Food for thought.