The Squadron of Justice was a name used by two superhero teams of characters who originated from Fawcett Comics. Each team only made one appearance in a single story.
Fictional team history
First version
In Whiz Comics #21, the name had been applied to the somewhat obscure Marvel Family members known as the Lieutenant Marvels. Three young men from different areas of the country (Texas, the Ozarks and Brooklyn) all named Billy Batson were reading Captain Marvel’s comic book adventures and happened to wonder if saying "Shazam" would work for them as well. As it happened, Tall Billy, Hill Billy, and Fat Billy all said the word at the same time and were each transformed into one of the Lieutenant Marvels, having powers akin to Captain Marvel. They could only change if all three said the magic word at the same time along with the real Billy (in later appearances of the Lieutenant Marvels such as Shazam #30, this limitation was ignored, though none of them operated singly as a Marvel).
Second version
The "modern" Squadron of Justice appears in one storyline, in Justice League of America #135-137 (October–December 1976). Though the team was never called "Squadron of Justice" formally, it was referred to as "Shazam's Squadron of Justice" on the cover of Justice League of America #135.
Based on the parallel Earth known as Earth-S, the Squadron's members are the following superheroes:
King Kull plans to completely destroy mankind on all three Earths so that his subjugated Beast-Men could once again rule over all, as humanity had rebelled and killed most of then. Superman, Wonder Woman, Spy Smasher and Green Arrow headed to Earth-Two to battle King Kull's agents there: Queen Clea of Earth-Two, Penguin of Earth-One, Blockbuster of Earth-One, and Ibac of Earth-S. Queen Clea was planning to take over the entire continent of Atlantis (on Earth-Two, Atlantis had recently risen from the depths and was inhabited by two nations ruled by women; the inhabitants also learned to survive without mutating into water-breathers, like the inhabitants of Aquaman’s city on Earth-One did).
The heroes give a sample of the Joker's poison gas to Jim Barr (Bulletman) for analysis, as now Pinky's hair has also turned to diamond during the fight, but the analysis reveals that the gas was nothing but nitrous oxide,