How Long Will It Take You To Beat The Full Imperial Campaign?

What faction are you using for your first full-length campaign and how long do you think it will take you?

I'm playing a short campaign right now to unlock either Greece or Britannia which I will use for the full campaign.

I think it will take me 5-7 days to beat it (hard/hard diff)

Now, we shall see how long it really will take...

*this is not a race BTW, just for fun stories *