Universe
Marvel Universe

Real Name
Gustav Krueger

Aliases
None

Identity
Known to the American legal authorities

Citizenship
United States of America, formerly East Germany

Place of Birth
Breslau, Unified Germany (former East Germany)

First Appearance
Captain America #310

The Rattler then joined the rest of his allies in the battle against MODOK, though he was taken out of the battle quite early. Later, the Rattler and his teammates Diamondback, Death Adder, and Cottonmouth were sent to investigate the Porcupine's claim that he defeated Captain America. They were able to trick the Serpent Society, but the hero had a very difficult time battling all four criminals at once. Rattler, alongside Death Adder and Cottonmouth, were eventually defeated and imprisoned. However, Sidewinder intervened and set them free after a few hours.

During the Viper's invasion of the Serpent Society, the Rattler willingly switched sides and helped her overthrow Sidewinder. Unfortunately, the Rattler and his fellow serpents were defeated by Captain America and the Rattler regretted teaming up with a self-serving villain such as the Viper. At Diamondback's trial, the Rattler voted guilty, and later battled Captain America. He was quickly defeated, and sent back to prison.