Listen -- There was a struggle song they sang in my time -- it's still good, if you alter it a bit! Try it with me -- EARTH SHALL OVERCOME! EARTH SHALL OVERCOME! EARTH SHALL OVERCOME -- SOMEDAY!!
Reprints the first appearance of the Guardians of the Galaxy from Marvel Super-Heroes #18 with 4 pages edited. The cover was recolored for the reprint.
The year is given as 3007.
Charlie has been on patrol for six months at the start of the story, watching for Badoon. This implies that there was an ongoing threat preceeding the invasion.
Charlie was patrolling the "solar rim", which could be referring to the heliopause.
Martinex says Pluto was evacuated two months ago.
On Earth-691, humans had established a Moon colony and had landed on Mars by 1988.
The program that sent Vance to the stars was called Project Starjump.
Beta Centauri IV appears to have at least two large moons.
Yaka is described as a mineral. One panel implies that the yaka arrow discharges energy to shock a Badoon, but the action is unclear.
Vance says that he has "learned how to harness psychic energy", implying that he is only using a special technique, and does not possess any extraordinary power.
Charlie's ship is named for the United Cruiser C-57D in Forbidden Planet. In addition, the design is the same as a missile in Showcase #22.
Badoon is misspelled "Bardoon" once at the beginning of the story.
The title of the story and the song Vance teaches the Guardians at the end is a variation on We Shall Overcome, a key anthem of the US civil rights movement.