Ultron Sentries

Ultron Sentinels are artificially intelligent robots created by Tony Stark and controlled by Ultron.

Iron Man 3
Tony Stark recreated the Iron Legion that was previously destroyed by the Clean Slate Protocol after the Battle on the Norco.

Avengers: Age of Ultron
Ultron was created as the leader of the Ultron Sentinels. Ultron has the ability to move his conscious into any of the Ultron Sentinels.