The subject of this article appeared in Call of Duty. The subject of this article appeared in Call of Duty: United Offensive. The subject of this article appeared in Call of Duty: Finest Hour. The subject of this article appeared in Call of Duty 2. The subject of this article appeared in Call of Duty 2: Big Red One. The subject of this article appeared in Call of Duty 3. The subject of this article appeared in Call of Duty: Roads to Victory. The subject of this article appeared in Call of Duty 4: Modern Warfare. The subject of this article appeared in Call of Duty 4: Modern Warfare for the Nintendo DS. The subject of this article appeared in Call of Duty: World at War. The subject of this article appeared in Call of Duty: World at War for the Nintendo DS. The subject of this article appeared in Call of Duty: World at War: Final Fronts. The subject of this article appeared in Modern Warfare 2: Ghost. The subject of this article appeared in Call of Duty: Modern Warfare 2. The subject of this article appeared in Call of Duty: Modern Warfare: Mobilized. The subject of this article appeared in Call of Duty: Black Ops. The subject of this article appeared in Zombies mode The subject of this article appeared in Call of Duty: Black Ops (Nintendo DS). The subject of this article appeared in Call of Duty: Modern Warfare 3. The subject of this article appeared in Call of Duty: Modern Warfare 3 for the Nintendo DS. The subject of this article appeared in Call of Duty: Black Ops II. The subject of this article appears in Call of Duty: Black Ops Declassified The subject of this article appears in Call of Duty: Strike Team The subject of this article appears in Call of Duty: Ghosts The subject of this article appears in Extinction mode The subject of this article appears in Call of Duty: Advanced Warfare The subject of this article appears in Call of Duty: Heroes The subject of this article appeared in Call of Duty: Black Ops III. The subject of this article appears in Call of Duty: Infinite Warfare The subject of this article appears in Call of Duty: Modern Warfare Remastered The subject of this article appears in Call of Duty: WWII The subject of this article appears in Call of Duty: Black Ops 4 The subject of this article appears in Call of Duty: Modern Warfare (2019) The subject of this article appears in Call of Duty: Warzone The subject of this article appears in Call of Duty: Black Ops Cold War The subject of this article appears in Call of Duty: Mobile The subject of this article exists in or is relevant to the real world.

The United States of America (also referred to as the United States, the U.S., the U.S.A., or America) is a country in North America. It plays an important role in the Call of Duty series by having American soldiers appear in every Call of Duty game. World War II campaigns provide the setting for the first games until Call of Duty 4: Modern Warfare. The United States flag is also seen in Call of Duty: Heroes as a decorative item. The United States is the only country to be featured in all games of the Call of Duty series.

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