Premise: Duke is a fictional character from the "" toyline, comic books, and cartoon series. He is the G.I. Joe Team's First Sergeant, and debuted in 1983. The character is also featured in both the "" animated series and comic books. Channing Tatum portrays Duke in the 2009 live-action film, "", and the 2013 sequel "".
Hypothesis: G.I. Joe was a brand in the 80s.