AVENGERS volume 3, issues #19-22
Ultron gave itself a body made of pure adamantium. It recreated all of the previous Ultrons and created hundreds of new Ultron bodies, many of whom had bodies made of secondary adamantium, and reprogrammed them all with fiercely loyal minds. The army of Ultrons completely obliterated the Eastern European nation of Slorernia. The Avengers eventually put a stop to Ultron, but not before thousands were perished.