The Parademons are the inter-galactic troops, commanded by the alien god, Darkseid. They are minor antagonists in the DC comics, and minor players in the Non-Disney vs. DC Villains War.
A legion of Parademons appear, under the command of Kal-El, when he makes his move against Zygon and his armanda. They easily destroy their defenses, as well as many droids. When Zygon is defeated, the Parademons flee the battle, as soon as Kal-El annihilates the entire armanda.