 However, the robots could not distinguish enemy targets from friendlies, while the Volgans had developed teleportational technology; Volgan soldiers were able to teleport behind enemy lines and turn the robots on US soldiers, forcing the US to scale back its plans in the face of public outcry at home.By 2010, the Volgans had developed their own war robots, who were also unable to recognise friendlies and were designed for extreme brutality.With the world's oil reserves finally running out, the United States started "The Volgan War" under the guise of liberation but with the sole intention of capturing much needed oil reserves (leading to its unofficial name of the Fourth Oil War).