Sgt. Slaughter is a fictional character from the G.I. Joe: A Real American Hero cartoon series
He is voiced by himself.
Sgt. Slaughter was featured in the Sunbow G.I. Joe cartoon. Sgt. Slaughter is often described as the toughest of all the Joes. As an instructor and trainer, he spurs his trainees through the most physically challenging exercises, which he can perform quite easily. He is almost unnaturally strong and can fend entirely for himself in the roughest missions. In fact, he easily fends off several dozen B.A.T.s by himself in 2 episodes of the 2nd season miniseries. He even uses the fingernail on his thumb as a convenient screwdriver to gain access to the circuitry of an electronically locked door and short it open.
He first appeared in the second season opener, "Arise, Serpentor, Arise!". He was Doctor Mindbender's alternate DNA candidate in the latter's attempt to create Serpentor, because Cobra failed to capture a much different DNA sample. His DNA sample was destroyed by himself during the fight while Serpentor was created, so Serpentor supposedly never got Sgt. Slaughter's DNA sample. However, his severe impatience may be an indicator that he received at least a minor amount of his genetic material.
In the Sunbow cartoon series, Sgt. Slaughter is listed Commander of the G.I. Joe team as a drill Instructor, he is a legend among his fellow Joes & sometimes shares command with Beachhead as 4th in command, although he is higher than Flint & Beachhead.
He appeared in the episodes: Arise Serpentor Arise, My Brother's Keeper, Ninja Holiday, G.I. Joe & The Golden Fleece, Most Dangerous Thing In The World, Into Your Tent I Will Silently Creep, G.I. Joe: The Movie.