Moscow (location)

Moscow is the capital of the Russia and is seen in Call of Duty 2, Call of Duty: Modern Warfare 2, Call of Duty: Black Ops and Call of Duty: Modern Warfare 3.

Call of Duty 2
Moscow appears in mission "Red Army Training" and the multiplayer map of the same name.

Call of Duty: Modern Warfare 2
Moscow appears in singleplayer level "No Russian", multiplayer map "Terminal" and in the Special Ops mission "Terminal". Also, one of the Rangers asks "So when are we goin' to Moscow?" at the end of the mission Whiskey Hotel.

Call of Duty: Black Ops
Moscow appears briefly in a cutscene.

Call of Duty: Modern Warfare 3
Moscow appears in Yuri's flashback of the level "No Russian". It also appears in the remake of the map "Terminal"