Captain America (vol. 1) #337 (Jan. 1988):
“The Long Road Back”
by Mark Gruenwald, Tom Morgan, Dave Hunt

Captain America (vol. 1) #337

Title: “The Long Road Back”

Medium: comic

Cover date: Jan. 1988

Publisher: Marvel
Written by: Mark Gruenwald
Art by: Tom Morgan, Dave Hunt

16 characters in this story:

(Click links for info about character
and his/her religious practice, affiliation, etc.)
Pub. #
The Captain (Steve Rogers)
(lead character)
CBR Scale: I Protestant
Redeemers; Secret Defenders...  Marvel Timely 5,992
Falcon Falcon (Sam Wilson) hero
CBR Scale: S Baptist
black; SHIELD Super-Agents...  Marvel 531
Nomad Nomad (Jack Monroe) hero
  Secret Defenders
[sidekick of 1950s Captain America]
Marvel 131
D-Man D-Man (Dennis Dunphy) hero
CBR Scale: A Salvation Army
Night People; The Avengers...  Marvel 60
Redwing Redwing hero
CBR Scale: I N.A.
falcon; Pet Avengers
[falcon; partner of Falcon (Sam Wilson)]
Marvel 128
Vagabond Vagabond (Priscilla Lyons) supporting character
  Scourges of the Underworld
[part of The Captain's informal team]
Marvel 5
Puff Adder Puff Adder (Gordon Fraley) villain hero
  Initiative; Serpent Society...  Marvel 33
Black Racer Black Racer (Ariana Saddiqi) villain
  Serpent Society; Serpent Squad Marvel 19
Fer-de-Lance Fer-de-Lance (Teresa Vasquez) villain
  Serpent Society; Serpent Squad Marvel 26
Copperhead Copperhead (Davis Lawfers) villain
  Serpent Society; Serpent Squad Marvel 13
Battlestar Bucky (Lemar Hoskins)
  Anti-Registration Underground; black... 
[sidekick of U.S. Agent]
Marvel 67
Captain America (John Walker)
CBR Scale: S Evangelical Protestant
Force Works; Omega Flight...  Marvel 333
Viper Viper (Ophelia Sarkissian)
CBR Scale: M nihilist
Fangs (leader); HYDRA... 
[former servant of Chthon]
Marvel 153
Commission on Superhuman Activities Commission on Superhuman Activities
supporting character group
  [U.S. govt. agency for regulating superhuman activities] Marvel 24
Brother Nature Brother Nature (Mark Diering)
(flashback cameo)
CBR Scale: D fundamentalist
[claims to have been empowered by Gaea to defend nature] Marvel 2
Sean Connery Sean Connery
real/historical person
CBR Scale: I Catholic
[actor] Marvel 211

A few different groups of snake-themed villains have used the name "Serpent Squad." Ultimately, most members of the various Serpent Squads ended up being members of the larger Serpent Society. One "Serpent Squad" was initially organized by Viper in order to infiltrate the Serpent Society. The members of this Serpent Squad were Black Racer, Copperhead, Fer-de-Lance, and Puff Adder. As chronicled in Captain America (vol. 1) #337, these snake-themed villains claimed to be potential new members of the Serpent Society who were trying out for positions in the Society, but when they had their chance, they followed Viper's orders to attack the Society and poison the Society's leader, Sidewinder.

Despite this rather confrontational introduction to the Serpent Society, this Serpent Squad was short-lived, as its members soon saw the benefit of being part of the Serpent Society, joined it, and became longstanding regular members.

This "Serpent Squad" really only appeared in Captain America (vol. 1) #337, because when these characters were next seen, they were part of the Serpent Society.