These advantages, however, were nullified by the shameful incompetence and carelessness of the government.
I haven't lived for millions of years in your world, but I believe Rhyn here would have to die permanently so his claim on me was nullified.
In the army itself the esprit de corps and the sense of duty and discipline nullified the work of the propagandists.
Moreover, this is nullified by extreme sexual dimorphism.
Thus, the effect of the varying airspeed as a result of blade rotation is nullified.