Flash (Barry Allen)
In a story told in flashback in "Justice League of America" #9 (February 1962), the Appellaxians infiltrated Earth. Competing alien warriors were sent to see who could conquer Earth first, to determine who will become the new ruler of their home planet. The aliens' attacks drew the attention of Aquaman, Batman, Flash (Barry Allen), Green Lantern (Hal Jordan), Martian Manhunter, Superman and Wonder Woman. While the superheroes individually defeated most of the invaders, the heroes fell prey to a single competitor's attack; only by working together were they able to defeat the competitor. For many years, the heroes heralded this adventure as the event that prompted them to agree to pool resources when confronted with similar menaces.