Avengers. Doombots go on a rampage. The Avengers have to beat them. Once it looks like they’re about to win, the robots turn off. Doom pulled a kill switch. He claims that it was an accident and the bots went out of control. Since he’s got diplomatic immunity, SHIELD has to take him at his word. Tony decides to make the Iron Legion after this, seeing the value in cybernetic shock troops.
Marvel Story 55