Hey [@Zoldyck]

Your conquering people just used the next level of warfare against experienced conquerers

You just tried to gas the experts of war
What does that mean?

Oh...
They'll just gas any planet they can find that's yours. Revenge, see. You killed a few thousand soldiers- they'll make you pay for it tenfold. Such is Draconian logic. 

Prepare to have a slew of biomechanical genetically engineered cybernetically enhanced creatures come raining down on your lands, bringing with them lungs that inhale anything, and exhale poison! Spits acid! Flies, stings, fires lasers, has a shield!