Revenge of the Fallen (franchise)
In the 2009 film, Revenge of the Fallen, Los Angeles is revealed to be the home of Sam Witwicky when his driver's license is shown on television during the Decepticons' satellite feed hijacking. It is also mentioned as the place where the major battle between the Autobots and Decepticons occurred two years before. In that film, the city where the battle occurred was known as Mission City, though it was very obviously filmed in Los Angeles. This is likely a retcon, as well as the fact that the Witwickys were previously referred to as residents of Tranquility.