King Cobra
Klaus Voorhees

In Captain America (vol. 1) #163, three serpent-themed villains (Viper, the Eel, and Cobra) banded together to form the "Serpent Squad." Their goal was to get revenge on Captain America and the Falcon for past defeats.

A second incarnation of the Serpent Squad appeared in Captain America #s 180-182, comprised of Viper (Dixon), the Eel, Princess Python, Cobra and Krang. The group tried to use the Serpent Crown to take over the world.

This character is in the following 56 stories which have been indexed by this website:
Captain America

Captain America (vol. 1) #163 (July 1973): "Beware of Serpents!"
Captain America (vol. 1) #165 (Sep. 1973): "The Yellow Claw Strikes!" (mentioned)
Captain America (vol. 1) #180 (Dec. 1974): "The Coming of the Nomad!"
Captain America (vol. 1) #181 (Jan. 1975): "The Mark of Madness!"
Captain America (vol. 1) #182 (Feb. 1975): "Inferno!"
Captain America (vol. 1) #183 (Mar. 1975): "Nomad: No More!" (mentioned)
Captain America (vol. 1) #184 (Apr. 1975): "Cap's Back!" (1-panel cameo)
Captain America (vol. 1) #185 (May 1975): "Scream the Scarlet Skull!" (mentioned)
Captain America (vol. 1) #188 (Aug. 1975): "Druid-War" (mentioned)
Captain America (vol. 1) #261 (Sep. 1981): "Celluloid Heroes!" (cameo)
Captain America (vol. 1) #293 (May 1984): "Field of Vision!"
Captain America (vol. 1) #308 (Aug. 1985): "The Body in Question" (photo/picture/video)
Captain America (vol. 1) #309 (Sep. 1985): "Nomad Madcap Cap..."
Captain America (vol. 1) #310 (Oct. 1985): "Serpents of the World Unite!"
Captain America (vol. 1) #311 (Nov. 1985): "Working..."
Captain America (vol. 1) #313 (Jan. 1986): "Mission: Murder MODOK!"
Captain America (vol. 1) #315 (Mar. 1986): "The Hard Sell"
Captain America (vol. 1) #319 (July 1986): "Overkill"
Captain America (vol. 1) #320 (Aug. 1986): "The Little Bang Theory"
Captain America (vol. 1) #341 (May 1988): "In Our Midst!"
Captain America (vol. 1) #342 (June 1988): "The Snake Pit"
Captain America (vol. 1) #343 (July 1988): "Slippery People"
Captain America (vol. 1) #344 (Aug. 1988): "Don't Tread On Me!"
Captain America (vol. 1) #365 (Mid-Dec. 1989): "Hyde -- and Seek!" (lead character)
Captain America (vol. 1) #366 (Jan. 1990): "Nowhere to Hyde!" (lead character)
Captain America (vol. 1) #367 (Feb. 1990): "The Way of the Snake" (lead character)
Captain America (vol. 1) #368 (Mar. 1990): "Red Twilight"
Captain America (vol. 1) #379 (Nov. 1990): "The Warning"
Captain America (vol. 1) #380 (Dec. 1990): "With Friends Like These..."
Captain America (vol. 1) #381 (Jan. 1991): "This Gun's for Hire"
Captain America (vol. 1) #382 (Feb. 1991): "Why Does It Always Have to Be Snakes?"
Captain America (vol. 1) #385 (May 1991): "Loose Ends" (photo/picture/video)
Captain America (vol. 1) #400 (May 1992): "Murder By Decree!" (illusion)
Captain America (vol. 1) #434 (Dec. 1994): "Snake Bites"
Captain America (vol. 1) #435 (Jan. 1995): "Snake, Battle, and Toll"
Captain America (vol. 1) #436 (Feb. 1995): "Everybody Hurts Sometime"
Captain America Annual #10 (May 1991): "Forgive Us Our Trespasses"

Captain America: The Legend #1 (Sep. 1996)
Daredevil

Daredevil (vol. 1) #6 (Feb. 1965): "Trapped by... The Fellowship of Fear!" (statue)
Daredevil (vol. 1) #30 (July 1967): "-- If There Should Be a Thunder God!"
Daredevil (vol. 1) #31 (Aug. 1967): "Blind Man's Bluff!"
Daredevil (vol. 1) #32 (Sep. 1967): "...To Fight the Impossible Fight!"
Daredevil (vol. 1) #33 (Oct. 1967): "Behold...the Beetle!" (mentioned)
Daredevil (vol. 1) #61 (Feb. 1970): "Trapped--By the Trio of Doom!"
Daredevil (vol. 1) #142 (Feb. 1977): "The Concrete Jungle!"
Daredevil (vol. 1) #143 (Mar. 1977): ""Hyde and Go Seek", Sayeth the Cobra!"
Daredevil (vol. 1) #152 (May 1978): "Prisoner!" (cameo)
Daredevil (vol. 1) #153 (July 1978): "Betrayal!"
Daredevil (vol. 1) #154 (Sep. 1978): "Arena!"
Daredevil (vol. 1) #235 (Oct. 1986): "A Safe Place" (cameo)
Daredevil (vol. 1) #356 (Sep. 1996): "Burden of Proof" (mentioned)

Dark Reign Files #1 (Apr. 2009)
Journey Into Mystery (vol. 1) #98 (Nov. 1963): "Challenged by the Human Cobra!"
Tales from the Age of Apocalypse #2 (Dec. 1997): "Sinister Bloodlines"
Thunderbolts

Thunderbolts (vol. 1) #104 (Sep. 2006): "Taking Civil Liberties [Part 2]"
Thunderbolts (vol. 1) #107 (Dec. 2006): "Power Full, Part 1"

Suggested links for further research about this character:
  - http://comicbookdb.com/character.php?ID=1802
  - http://comicbookdb.com/character.php?ID=6695
  - http://www.marvel.com/universe/Thunderbolts
  - http://www.marvunapp.com/master/coacol.htm
  - http://www.marvunapp.com/master/hum.htm
  - http://www.marvunapp.com/master/kinkiz.htm
  - http://www.comicboards.com/marvelguide/c3.html
  - http://www.comicboards.com/marvelguide/ageofapocalypse.html
  - http://www.marvunapp.com/master/thosthz.htm
  - http://www.marvunapp.com/master/seosg.htm
  - https://www.comics.org/issue/61097/
  - http://marvel.wikia.com/Tales_From_The_Age_of_Apocalypse_Vol_1_2

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