Scenario: party encounters small pack (flock?) of flame drakelings. Party proceeds to slaughter or be slaughtered. Last drakeling, martial takes a shine to it and manages to catch it in a metal pot with a lid, chains the lid shut and takes it back to town.
Martial wants to tame and train the drakeling basically.
Its disposition is at -3, it has an INT of 6, is there anything the martial can do to get this thing on his side after participating in the slaying of its family and carrying it several tens of miles in a pot?
He better have a really good Diplomacy skill to convince it to forgive him for killing all of his friends and family and join him.
Also, Leadership feat covers this I think.
They can't be 'tamed' any more than you could 'tame' a person. Diplomacy could adjust it's attitude, intimidate could make it behave.
It isn't real smart, but it is a sentient creature, speaks a language and is certainly able to remember what has happened to it.
Whether that can be overcome is up to the GM.