Something I can't make out from the core rules:
When the main players ask for allies, the other players can say yes or no. But who decides the number of ships that the allies contribute with?
For instance, if player A asks player B to be an ally, do they agree beforehand how many ships B will contribute with? If so - does B have to do as agreed?
If player A is not satisfied with the number of ships that B contributes with, can player A then call off the alliance and attack on his own? Or does player A have to take on B as an ally once player B has been asked and agreed to be an ally?
I'm asking because you might be reluctant to bring an ally with only one ship, whom you still have to share the win with...