As mentioned in an earlier Xbox Resource article, DICE started a promotion with their recently released DLC Battlefield: Bad Company 2 Vietnam
in which the Bad Company 2 community would have to reach 69 million support actions to unlock a fifth map with the Vietnam expansion.
The fifth map is now unlocked - titled Operation Hastings - by only one platform of the game...PC. DICE is generous though, and decided to start 2011 with a bang by giving the map to all platforms of the game with those who purchased the Vietnam DLC. If you have Vietnam, hop on it today to play Operation Hastings!