A 6-3 victory for the Alemanni. In the second turn, they exit three units. Then an unlucky attack by the Romans ends with two Roman cavalries destroyed by one barbarian warrior unit. On the third turn the Alemanni exit another cavalry for the victory. The entire game lasted 10 minutes. Not a great scenario.
Maybe a house rule removing the exit points and forcing the Allemanni to fight (Since the mountain passes are blocked as the scenario says) would make things both more historical and more entertaining. I think I'll try that.
Messed up posting about Pavia revisited.
Anyway, 2 more solitaire games, with the Alemanni winning both, 6 - 1, and 6 - 4. The second was a little closer, but it was too much cavalry once again. There is no way the Romans can catch them from escaping.