It's been a few years since I've played Travian, but in the past I remember attacking an oasis with my hero, having him equipped with cages. When I did that, there'd be no fighting, he'd just come home with all the cages filled.
If I sent a hero with seven cages to raid an oasis with 7 rats, 6 spiders and 4 bats, and I sent seven phalanxes along with him, what would happen? Would there be any fight? Would the phalanxes be forced to fight on their own? Or would the hero capture seven animals as well as help with fighting the rest?