Q: Someone told me about National Lampoon running an advertisement selling a Kent State Playset that came with 10 plastic national guardsmen shooting, 10 guardsmen running, 4 dead students, 1 student kneeling, a box that doubles as an ROTC building etc. What issue was this in?
A: It was a fake ad in the comic book parody “G. Gordon Liddy, Agent of C.R.E.E.P.” from the October 1973 (Banana) issue. (Thanks to Dell for answering this.)