Supermen of America (Supermen of America Vol. 2 #4)

While the Warlords of Okaara and Kalibak invade earth for Lockdown #6, the Supermen try to stop them, with limited success. They are aided by Guardian, Dubbilex, Superboy and Superman. White Lotus successfully negotiates with the Warlords to stand down, but it is too late as Kalibak opens the Lockdown Chamber.