Well, it looks like the Brotherhood are so terrified of Captain Costello that they have to send whole divisions to attack his, still unfit for combat, Osiris, the Havana. Apparently they need a cruiser, two bombers, some fighters and a gunboat to attack an unready battleship.
I jumped in as quickly as possible, and found myself swarmed. I ordered all troops on the surface to scatter and take cover in underground complexes, inspired by ancient Terran strategies used by our Vietnamese Communist predecessors. The bombardment mostly hit Zoner and Corsair settlements, but thankfully our raid sirens were able to warn them before it began.
We dropped to Gran Canaria's surface safely, evading enemy fire.
It appears that our guerrilla tactics are working well. We've got the foe scared, afraid to venture out alone and we've still to lose a ship in combat.