While the deal with the US corporation is dependent of approval from the regulators and representatives of Alstom's workforce, France's government has backed it, securing a 20 percent stake in Alstom, and taking other measures to protect French interests. A rival offer from Siemens-Mitsubishi Heavy Industries was rejected. If it is approved, the deal, said to be the largest industrial acquisition that GE has ever made, is expected to be completed in 2015.