What is the oldest call of duty?

Call of Duty is the first game in the series. Call of Duty: Finest Hour took place on December 3, 2004. Call of Duty 2 took place on Oct 25, 2005. Call of Duty 2: Big Red was released in 2005. Call of Duty 3 took place on Nov 7, 2006 Call of Duty 3: Roads to Victory will be released on March 13, 2007. Call of Duty 4: Modern Warfare was released in November of 2007.