The Avengers #80

"The Coming of Red Wolf!"

A costumed being named Red Wolf (and his wolf Lobo) are stalking a hood named Jason Birch, the subsequent chase attracts the attention of the Vision who interferes. Birch makes his escape, angering Red Wolf who attacks Vision. The Vision quickly defeats Red Wolf and decides to take him back to Avengers Mansion.

While at the mansion, the Avengers are continuing an investigation into the mysterious group of criminals known as the Zodiac. Vision arrives with the unconscious Red Wolf, and when the Avengers revive the hero they hear his story: That he came from an Indian tribe in Phoenix, Arizona that believed in the legend of Red Wolf, a warrior who came from the sky. His people's land was sought to be bought out by Cornelius Van Lunt, the man who would become Red Wolf didn't care about his heritage and went off to fight in Vietnam where he was injured in combat. When he finally healed, he returned to the United States and took up a job as a steelworker in New York.

When he finally returned home, he found Van Lunt's men threatening his grandfather to sign over the land, which he still refused to sell. That night Van Lunt's men came back and gunned down the man's family, he is the sole survivor. The young man would then go into the mountains and do the dance to summon Red Wolf, he was then empowered with Red Wolf's abilities and soon adopted Lobo shortly after he killed the wolf's mother. Returning to New York and resuming his job as a steelworker by day, at night he would stalk after Van Lunt as Red Wolf. Which was what he was doing before he was interrupted by the Vision.

After much deliberation and conflict over their priorities -- Red Wolf's plight, and their investigation of the Zodiac -- the Avengers decide to split in two groups: Vision, Goliath, and the Scarlet Witch agree to leave with Red Wolf to Arizona to deal with Van Lunt, while Captain America, Thor, Iron Man, Quicksilver, and Black Panther stay in New York to find leads on the Zodiac organization.