One Year War
Sleggar was assigned to White Base as it was departing from Jaburo. He was an ace pilot and brilliant gunner, frequently spending his time operating either the G-Fighter or White Base's main gun. He had a strong, cheerful, flirtatious and brutally honest personality. He repeatedly hit on the female crew members such as Mirai and Sayla, but also tried to defend Mirai from what he thought as mistreatment from her fiance Cameron Bloom. He began a brief romance with Mirai which started during the battle of Solomon. However, Sleggar felt that Mirai was too wonderful and deserved better than someone like him, so he rejected further advancement. He gave her a ring that belonged to his mother before he headed out to battle.
During the subsequent battle, the MA-08 Big Zam piloted by Dozle Zabi appears, and with its overwhelming firepower, it destroys the Titan, the flagship of Commander Tianem, as well as many other ships and MS, while disabling long-range beam attacks against it with a I-field barrier. In order to stop the onslaught, he dares to make a suicide attack by getting close enough with the G-Armor to make the attack effective. However, Big Zam's claw hits the aircraft near the cockpit, and it is grabbed by Big Zam's legs, causing the front part of his G-Armor to be severely damaged and Sleggar is thrown into space to die in battle. His sacrifice draws the wrath of Amuro Ray, who separates the RX-78-2 Gundam from the wrecked G-Armor and fires a beam rifle at close range into the Big Zam's crotch vernier, then slashes it with a beam saber to destroy it.
In the compilation movie Mobile Suit Gundam III: Encounters in Space, Sleggar slams his Core Booster into the Big Zam, dying on impact. This is reflected in subsequent UC productions, such as Mobile Suit Gundam: The Origin and a flashback in Mobile Suit Gundam Unicorn.
In the strategy game "Gihren's Greed", if Sleggar survives the One Year War, he will resurface in the second half of the game as a member of the AEUG alongside his former White Base compatriots, wearing a Zeta Gundam-era pilot suit in blue (his personal color). In conversing with some of his teammates, he is considered to not have changed much from his carefree personality seven years ago.
- Mobile Suit Gundam writer and director Yoshiyuki Tomino imagined Sleggar as being similar in appearance to the lead actor of Rocky (Sylvester Stallone). Character designer Yoshikazu Yasuhiko expressed considerable difficulty in designing Sleggar to his specifications because, at the time, he had not seen the movie.
- Noburo Ishiguro, director of the Super Dimension Fortress Macross, said in an interview with the magazine Gundam Ace that the character Roy Focker was like a son of Sleggar Law. Ishiguro said that he really liked the character of Sleggar, so he wanted to have someone like him in Macross, but also with a more significant participation in the series.
- Amusingly, "Sleggar Law" is an anagram for "all swagger", an appropriate description of his introductory personality.
- In some Super Robot Wars games, it's possible to avert his canonical death by simply not deploying him in battle in any stage that plays out the assault on the Big Zam.