Justice League of America #3
"The Slave Ship of Space" First appearance of Kanjar Ro. Fighting crime and saving lives across the nation, the Flash, Green Lantern, Martian Manhunter, Batman, Aquaman and Wonder Woman each receive a signal to return to the JLA headquarters. Even Snapper Carr, the team mascot, gets the call, interrupting a promising date. But once assembled, the super-heroes cannot discern who summoned them or why they were summoned. That is, until Kanjar Ro makes his presence known and immediately uses an alien sonic device to paralyze the JLA. While they stand motionless, the space tyrant explains why he brought the heroes together. Three rivals--Hyathis, Kromm and Sayyar--have fought Kanjar Ro and each other to a galactic standstill for territory and power. Now Kanjar Ro plans to use the JLA as his newest weapon to win final victory over his alien foes.
Ingeniously, Kanjar Ro has paralyzed all life on Earth and arranged it so that they'll only go free when his three opponents speak his name. Even Superman won't be able to come to the JLA's aid, since Kryptonite gas has been rigged in the headquarters to neutralize him as soon as he enters. With their slavish task before them, the JLA take up positions at the oars of Kanjar Ro's bizarre interstellar galley. On alien landscapes, Martian Manhunter, Aquaman and Wonder Woman, Flash and Green Lantern each outwit their targets and turn them over to Kanjar Ro. But the space tyrant has a double-cross in mind; one which the JLA quickly turns around on him. Freeing the people of Earth and imprisoning Kanjar Ro with his enemies on a desolate planet, the Justice League once again proves that right makes might.