The Battle at the Salvage Yard was a three-way conflict between Ultron, the Avengers, and Ulysses Klaue's group of mercenaries at a Salvage Yard on the coast of Africa.
Ultron had finished building a new body at the HYDRA Research Base and recruited Quicksilver and Scarlet Witch to his cause.
Then, they proceeded to obtain information on Klaue from Wolfgang von Strucker before murdering him. Ultron went to the Salvage Yard with the twins in order to obtain Vibranium from Ulysses Klaue.
The Avengers would soon follow suit. Thor and Captain America attempted to peacefully confront the trio, but Ultron attacked Iron Man.