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He is the the Nephew of King Solovar and next in line to the throne. When King Solovar arrived in New York however to petition the United Nations for membership as a sovereign nation, a car bomb destroys his limousine, killing him. An organization known as the Human Supremacy Movement claims responsibility for the attack.
Solovar's council seat is taken up by Ulgo. The members of the Inner Circle of the Simian Scarlet call for a full war between the apes and the humans. The Simian Scarlet include Admiral Trafalgo, General Zolog and Grimm. It is revealed that they are subconsciously being manipulated by the telepathic prowess of Gorilla Grodd.
The US government sends the Justice League to act as intermediaries between apes and humanity. They believe that Aquaman and Wonder Woman's roles as monarchs should help pave the way for a diplomatic accord. They arrive in the city and are attacked by the city's militia. They are attacked by Gorilla-Bomb that transforms the Justice League members into apes. The Martian Manhunter's telepathy enables him to maintain his true demeanor and he manages to get them back to the Watchtower.
At the Watchtower, Batman and Green Lantern are unaffected by the Gorilla-Bomb gas as they did not accompny their team mates to Gorilla City. Batman and Martian Manhunter begin running tests in the hopes of finding a way to reverse the effects. Martian Manhunter flies off to the Southwest to consult with Animal Man, but his ties to the anthropomorphic field have made him mentally unstable. Returning to the Watchtower, Martian Manhunter finds several JLApe members fighting over the right to mate with Wonder Woman. Martian Manhunter uses telepathic meditation techniques on all of them to get them to calm down.
Meanwhile, Ulgo, and his Gorilla's arrive at the United Nations building. He addresses the General Assembly and openly declares war on the Humans. His soldiers fire Gorilla-Bombs into the crowd, and instantly transform the council members into apes.The JLApe arrive and begin fighting the gorillas. The Martian Manhunter has cobbled together something that can turn them back to normal, but there isn't enough to transform both the Justice Leagueand the General Assembly. The JLApe agree that innocent bystanders are more important, and Martian Manhunter activates the device. Everyone in the U.N. building revert to normal, but the Justice League are still apes. Batman is concerned that Martian Manhunter is holding something back from him. Charges cannot be brought against Ulgo as he has claimed diplomatic immunity.
- Genius Level Intellect: with knowledge of technology beyond the development of human civilization
- 4 Appearances of Ulgo (New Earth)
- 1 Images featuring Ulgo (New Earth)
- 1 Quotations by or about Ulgo (New Earth)
- Character Gallery: Ulgo (New Earth)