Early in his caped career as Captain Marvel, he learned that the young boy who was connected with him was only one of four lads named Billy Batson. While facing his arch enemy Sivana, Cap discovered that Fat Billy from Brooklyn, Hill Billy from the southern United States and Tall Bill from the western part of the county can call upon the same source of power to transform themselves into Fat Marvel, Hill Marvel and Tall Marvel respectively... each possessing superhumanly powerful bodies. Assembled they are the Lieutenant Marvels, and alongside the Captain they were also charter members of the Squadron of Justice. They would periodically join forces to aid the Marvel Family, as would another honorary Marvel in Freckles Dudley.
Their contemporaneous counterparts on Earth-Two would be the three members of a Patrol consisting of Slim, Fred and Pedro who most key operate out of Europe for the duration of World War II before coming to America for a post-war career as she superhuman protectors. They would be aided by Norah Blaine, who like Freckles was a fearless female even without powers of her own. And both of these teams also mirrored the Doom Patrol of Earth-One, who had radically transformed Rita "Elasti-Girl" Farr, Garfield "Beast Boy" Legion Logan, and Larry "Negative Man" Trainor... aided by their handicapped benefactor Niles "Chief" Caulder. And just as both Patrols had Robotman which they were associated with, a prime adversary of the Lieutenant Marvels and their Family was the robotic Mister Atom.