|Brock "Bingo" Rumlow|
|Unknown citizen with an international criminal record.|
|Nation or Planet of Origin|
|Base of Operations|
Normal human with Olympic level strength, speed, stamina and agility.
Excellent hand-to-hand and armed combatant.
|Civilian and military weaponry.|
|Captain America I|
|Captain America Vol. 1 & 4|
Captain America Vol. 1 #359 (Early Oct. 1989)
Captain America Vol. 1 #360 (Late Oct. 1989)
|Mark Gruenwald & Kieron Dwyer|
A bad seed even as a child Brock Rumlow always admired the bad guys, the Red Skull in particular.
As a mercenary, Rumlow was hired by a Red Skull imposter to attack the fortress of the bio-fanatic Arnim Zola. All of Rumlow's fellow mercenaries were killed in the assault, but his skills so impressed the real Red Skull that he hired him as a bodyguard and gave him the identity of Crossbones.