Roy Thomas and penciller John Buscema created an alternate-universe team of heroes called the Squadron Supreme, who debut in "The Avengers" #85 (Feb. 1971). After an initial skirmish with four Avengers, the teams unite to stop a common threat. The characters (including Nighthawk) were identical in name and appearance to the Squadron Sinister, which caused confusion in Marvel's production department, as the covers of "The Avengers" #85 and #141 (Nov. 1975) "cover-blurbed" appearances by the Squadron Sinister, when in fact it was the Squadron Supreme that appeared in both issues.