It's easier to start from the end by googling "Call of Duty founders" than starting from Medal of Honor and hoping there aren't too many branches with only one leading to Call of Duty (which is the case here).
"Call of Duty founders" -> first link: https://en.wikipedia.org/wiki/Infinity_Ward -> 3rd sentence: All of the 22 original team members of Infinity Ward came from the team that had worked on Medal of Honor: Allied Assault
"Call of Duty founders" -> first link: https://en.wikipedia.org/wiki/Infinity_Ward -> 3rd sentence: All of the 22 original team members of Infinity Ward came from the team that had worked on Medal of Honor: Allied Assault