Erik Josten was born in Milwaukee, Wisconsin. A former AWOL Marine turned mercenary, he is employed by Heinrich Zemo as head of his South American security/mercenary force. After Zemo's death, Josten is convinced by the Enchantress to undergo the same 'ionic-ray' treatment (from a machine invented by Zemo) as Simon Williams (Wonder Man), making Josten super-strong (though not as strong as Wonder Man since the treatment was specifically calibrated to Williams and the Enchantress wasn't aware it had to be tailored to the subject). Taking the name "Power Man", he becomes the Enchantress' partner and battles the Avengers at her request.