Grant Morrison's ultimate JLA story continues with Part 4 of the 6-part "World War Three"! The JLA Watchtower has fallen and war rages across the globe as the ultimate enemy, Mageddon, approaches Earth! While Green Lantern rallies everyone who's ever been a Justice Leaguer to fight the Queen Bee's invading armada, Superman and Orion battle the unstoppable General in the Ghost Zone! To make matters worse, the nations of the world get swept up in the war-fever induced by Mageddon's approach! If our heroes can barely handle all of this, what hope will they have against Mageddon itself?