*The super-villain known as the Mandarin (whose rings of power were actually artifacts from Foom's spaceship) found in the Valley of the Sleeping Dragon, having been directed there by the Makluan starship captain, who had taken the human identity of Chen Hsu. Awakening Fin Fang Foom (who was now over one hundred feet tall), Mandarin used him to threaten the Chinese government. The Chinese called in Iron Man to confront them, but he was quickly defeated. Another Iron Man arrived to help, but at this point, the rest of Foom's crew decided to shed their mortal shells and revealed themselves to the world. Foom and nearly a dozen of his cohorts terrorized the Chinese before the two Iron Men along with the Mandarin - who realized the aliens were merely using him - combined the energies of Iron Man's armor and the Mandarin's rings into a small nuclear blast that was thought to have wiped out the dragons.
Source: Marvel.com