How many blacks ops are there?

How many blacks ops are there? Black Ops is a sub-series of the Call of Duty franchise from Activision and developed by Treyarch, and includes Call of Duty: World at War, Call of Duty: Black Ops, Call of Duty: Black Ops II, Call of Duty: Black Ops III, Call of Duty: Black Ops 4, and Call of Duty: Black Ops Cold War.

Black Ops is a sub-series of the Call of Duty franchise from Activision and developed by Treyarch, and includes Call of Duty: World at War, Call of Duty: Black Ops, Call of Duty: Black Ops II, Call of Duty: Black Ops III, Call of Duty: Black Ops 4, and Call of Duty: Black Ops Cold War.
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