Firaxis recently announced the Civilization V: Brave New World expansion will be launching on July 9 for North American and July 12 for the rest of the world.

During PAX East, Firaxis also revealed that Civilization V will also now include playable units from XCOM: Enemy Unknown. The XCOM units are paratroopers that can be used to drop in 40 units away with none other than the Skyranger.

Source: Kotaku, Joystiq