Green Lantern #69 (On Sale: April 8, 1969) has a cover by Gil Kane.
"If Earth Fails the Test -- It Means War" is by John Broome, Gil Kane and Wally Wood. Green Lantern returns from a space mission to find that the police in Evergreen City have invented three new devices to fight crime: a city-wide burglar alarms system, a radar-television to remotely view the crime scenes and a device that remotely traps criminals at the scene. While viewing the new system GL gets to see it in action when an alarm is tripped at the Central Jewelery Exchange. Blue bars are used to trap the criminals inside the vault, but utilizing a strange hand-held device they are able to bend the bars out of the way and escape.
Green Lantern heads out to round up the gang, which is led by the beautiful Kyra, who uses another device to deflect Lantern's energy beams. As he attempts to capture them, most of the gang, including Kyra, disappear, fading away before GL's eyes.
After taking the three captured members of the gang to police headquarters, Lantern receives a phone call from Carol Ferris, who tells him that she is getting married tomorrow and wants to know if there is anything he would like to say to her. Realizing that Carol is in love with Green Lantern but not Hal Jordan, he wishes her the best. He also realizes that he is both repulsed and attracted to Kyra and can't figure out why.
We back-track a week to see Kyra in her real, fairly hideous, alien form on her home-world of Hegor, where she is the leader of a student movement to "uproot the ancient ways of doing thing-- and breathe fresh life into our tradition-encrusted civilization." They have implanted the ideas for three new devices in the minds of certain officials on Earth, devices much like those used by the authorities on Hegor. They plan to go to Earth and commit thefts where they can train against the devices which will be used on their world against them during their revolution, without the knowledge of Hegoran authorities. Earth will become the testing ground for their revolution.
Back to real time and Kyra speaks to Hal through his ring, telling him she is in trouble, but when he follows the energy impulse back to Kyra it is a trap and Green lantern is stunned and captured. With the Lantern neutralized, Kyra and the gang continue with their training. GL is held in place by an alien machine which he attempts to destroy with an energy beam, but the more he uses his ring the more paralyzing radiation bombards his body and he is wracked by intense pain. Figuring he can withstand the pain for a short burst he wills his ring to make a concentrated pain-killer, which he swallows and then waits to take effect.
With the pain-killer in his system, Green Lantern is able to smash the alien device holding him captive and after a quick stop by police headquarters to find the location of the group's current cir me, GL tracks them down and battles them into submission. Once he has them captured Kyra explains their mission, which has been successful and tells him that their time on Earth is over. GL is unable to stop the entire gang from teleporting back to Hegor.
But Hal can't get Kyra out of his mind and realizes that he may be in love with her so he flies to Hegor and locates Kyra, seeing her as she really looks for the first time. Kyra tells him that thanks to the training they did on Earth the revolution was successful and that a coup was possible without a devastating war. Kyra also introduces Hal to Tarkro, the man she is to marry tomorrow. Hal returns to earth, spurned by Kyra, spurned by Carol, he cannot face his job as an insurance salesman and decides a change of careers is in order.
Edited by Julius Schwartz.