Operation Flashpoint: Red River

The game's plot will concern a fictional conflict in 2013 Tajikistan. When a civil war breaks out, the US Marines Corps move in to deal with it. However, the People's Liberation Army, of neighbouring China, become suspicious. When they order the Marines to leave, they refuse, and the world's next flashpoint erupts. Source: Wikipedia, "Operation Flashpoint: Red River," available under the CC-BY-SA License.