I think this is the oldest regiment that is still alive now
Sorry to be a party pooper, but The Royal Recruits have been around for more than 9 years...
Well, yes technically they have been around longer than us, but they are 1 year younger than us in MM/NW.
Quote from their forum "21.04.12 - The Royal Recruits starts officially practicing in the new game Napoleonic Wars"
Sooooooooooo technically we are older than them in the MM/NW community
But since i dont know any more about the regiment than what that forum thread say Im just going to agree that they are older than us.