I think I read their is a higher risk of loosing your general if he is attached to a unit which is destroyed but I can't remember where I read it. So it's better to assign only * or ** general to your legions.
In my campaign as Caesar, the AI landed in Italia very early with Pompeius too. The same thing happenend. I crushed the legions and killed Pompeius. After that it was easy to finish the campaign.
Only five posts and two days, and I get to have full priviledges?! What a small price to pay, for Spam-free conviviality! Whoever is the moderator: Thanks!